Problem:
 Score : 100 points    Problem Statement AtCoder Inc. holds a contest every Saturday.  There are two types of contests called ABC and ARC, and just one of them is held at a time.  The company holds these two types of contests alternately: an ARC follows an ABC and vice versa.  Given a string S representing the type of the contest held last week, print the string representing the type of the contest held this week.      Constraints  S is ABC or ARC .         Input Input is given from Standard Input in the following format:  S       Output Print the string representing the type of the contest held this week.        Sample Input 1 ABC      Sample Output 1 ARC  They held an ABC last week, so they will hold an ARC this week.

Solution (Python):
s = input()
if s == 'ABC':
  print('ARC')
else:
  print('ABC')

Solution (Python):
S = input()
if S == 'ABC':
    print('ARC')
else:
    print('ABC')

Solution (Python):
s = input()
if s == 'ABC':
    print('ARC')
else:
    print('ABC')

Solution (Python):
s = input()

if s == 'ABC':
    print('ARC')
else:
    print('ABC')

Solution (Python):
s =input()
if s=='ABC':
    print('ARC')
if s=='ARC':
    print('ABC')

Solution (Python):
N=input("")

if N=='ABC':
    print('ARC')
else:
    print('ABC')

Solution (Python):
S=input()

if S == 'ABC':
    print('ARC')
else:
    print('ABC')

Solution (Python):

S=input()


if(S == "ABC"):
    print("ARC")

else:
    print("ABC")

Solution (Python):



print({"ABC": "ARC", "ARC": "ABC"}[input()])

Solution (Python):
print({"ABC": "ARC", "ARC": "ABC"}[input()])

Solution (Python):




s = input()

answer = {
        'ABC': 'ARC',
        'ARC': 'ABC'
        }

print(answer[s])

Solution (Python):
import sys
input = sys.stdin.readline

import numpy as np

s = np.array(list(input().rstrip()))

ans = "ARC" if s[1] == "B" else "ABC"

print(ans)

Solution (Python):
S=input()
if S=="ABC":
    print("ARC")
else:
    print("ABC")

Solution (Python):
string = input().strip()

print("ARC") if string == "ABC" else print("ABC")

Solution (Python):
s = input()
if s == "ABC":
    print("ARC")
else:
    print("ABC")

Solution (Python):
s = input()

print("ABC" if s == "ARC" else "ARC")

Solution (Python):
S = input()

if S == "ABC":
  print("ARC")
else:
  print("ABC")

Solution (Python):
str = input()
if str == "ABC":
    print("ARC")
else:
    print("ABC")

Solution (Python):
S = str(input())

if S == 'ABC':
    print('ARC')
else:
    print('ABC')

Solution (Python):
s=input()
l=["ABC","ARC"]
for i in range(len(l)):
    if l[i]==s:
        print(l[i-1])
        exit()

Solution (Python):
s = input()
if s == 'ABC':
  print('ARC')
else:
  print('ABC')

Solution (Python):
S = str(input())
print('ABC') if S == 'ARC' else print('ARC')

Solution (Python):
S = input()

if S == "ABC":
  print("ARC")
else:
  print("ABC")

Solution (Python):
S = input()
if S == "ABC":
  print("ARC")
else:
  print("ABC")

Solution (Python):
S = input()
if S == "ABC":
  print("ARC")
else:
  print("ABC")

Solution (Python):
def main():
    S = input()
    li = ["ABC", "ARC"]
    print(li[1 - li.index(S)])


if __name__ == "__main__":
    main()

Solution (Python):
S=str(input())
if S=="ABC":
  print("ARC")
else:
  print("ABC")

Solution (Python):
print('ARC' if input()=='ABC' else 'ABC')

Solution (Python):
s=input()

if s=="ABC":
    print("ARC")
else:
    print("ABC")

Solution (Python):
s = input()
if s[1] == "R":
  print("ABC")
else:
  print("ARC")

Solution (Python):
def resolve():
    s = input()
    if s == 'ABC':
        print("ARC")
    else:
        print("ABC")
resolve()

Solution (Python):
x=input()
print('ARC' if x == 'ABC' else 'ABC')

Solution (Python):
print('AABRCC'[input()[1]=='B'::2])

Solution (Python):
S = input()
print("ABC" if S == "ARC" else "ARC")

Solution (Python):
s = input().rstrip()
print('ABC' if s == 'ARC' else 'ARC')

Solution (Python):
S = input()
if S == 'ABC':
    print('ARC')
else:
    print('ABC')

Solution (Python):
x=str(input())

if x == "ABC":
	print("ARC")
elif x == "ARC":
	print("ABC")

Solution (Python):
import sys
import math
import numpy as np
import copy

def main():
    s = input()
    print("ARC" if s == "ABC" else "ABC")
    return 0

if __name__ == '__main__':
    sys.exit(main())

Solution (Python):
a=input()
if a=="ABC":
  print("ARC")
else:
  print("ABC")

Solution (Python):
s = input()

if s == "ABC": print("ARC")
else:          print("ABC")

Solution (Python):
S=input()
if S == "ABC":
    print("ARC")
else:
    print("ABC")

Solution (Python):
S = input()
if S[1] == 'B':
  print('ARC')
else:
  print('ABC')

Solution (Python):
s = input()
if 'B' in s:
    print('ARC')
else:
    print('ABC')

Solution (Python):
s = input()

if s == 'ABC':
    print('ARC')
else:
    print('ABC')

Solution (Python):
s = input()
if s == "ABC":
  print("ARC")
else:
  print("ABC")

Solution (Python):
s=input()
if s=="ABC":
  print("ARC")
else:
  print("ABC")

Solution (Python):
S = input()
if S == "ABC":
  print("ARC")
else:
  print("ABC")

Solution (Python):
try:
  s=input()
  if s=='ABC':
    print('ARC')
  else:
    print('ABC')
except EOFError as e:
  pass

Solution (Python):
s = input()

if(s == 'ABC'):
    print('ARC')
else:
    print('ABC')

Solution (Python):
s=input()
if s=="ABC":
	print("ARC")
else:
	print("ABC")

Solution (Python):
contest=input()
if contest=='ABC':
  print('ARC')
elif contest=='ARC':
  print('ABC')
else:
  print('Error')

Solution (Python):
s = str(input())
if s == "ABC":
    print("ARC")
else:
    print("ABC")

Solution (Python):
def main():

    a = input()
    if a == "ABC":
        return "ARC"
    return "ABC"

if __name__ == '__main__':
    print(main())

Solution (Python):
S = input()

print('ABC') if S == 'ARC' else print('ARC')

Solution (Python):
import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines
sys.setrecursionlimit(10 ** 7)

s = readline().rstrip().decode()
ans = {'ABC': 'ARC', 'ARC': 'ABC'}
print(ans[s])

Solution (Python):
S = input()
if S == "ABC":
  print("ARC")
else:
  print("ABC")

Solution (Python):
import sys
input = sys.stdin.readline

def main():
    s = input().rstrip()

    if s == 'ABC':
        print('ARC')
    else:
        print('ABC')


if __name__ == '__main__':
    main()

Solution (Python):
S = input()
if S == 'ABC':
    print('ARC')
else:
    print('ABC')

Solution (Python):
print("ARC" if input() == "ABC" else "ABC")

Solution (Python):
a = input()
if a == "ABC":
  print("ARC")
else :
  print("ABC")

Solution (Python):
S = input()

if S == 'ABC':
  print('ARC')
else:
  print('ABC')

Solution (Python):
S=input()
if S=="ABC":
  print("ARC")
else:
  print("ABC")

Solution (Python):
s=input()
print('ABC' if s=='ARC' else 'ARC')

Solution (Python):
import sys
input = sys.stdin.readline



def main():
    S = input().strip()
    if S == "ABC":
        return "ARC"
    else:
        return "ABC"


if __name__ == "__main__":
    print(main())

Solution (Python):
data=input()
if data=="ARC":
    print("ABC")
else:
    print("ARC")

Solution (Python):
s = str(input())
print('ABC') if s == 'ARC' else print('ARC')

Solution (Python):
str1 = input()

if str1 == 'ABC':
    print('ARC')
else:
    print('ABC')

Solution (Python):
s = input()
if s == 'ABC':
	print('ARC')
else:
	print('ABC')

Solution (Python):
S = input()
if S == 'ABC':
    print('ARC')
else:
    print('ABC')

Solution (Python):
s = input()
if s == 'ABC':
  print('ARC')
else:
  print('ABC')

Solution (Python):
S=input()

if S=='ABC':
    print('ARC')

else:
    print('ABC')

Solution (Python):
name=input()
if name=="ARC":
  print("ABC")
else:
  print("ARC")

Solution (Python):
def main():
    S = input()
    a = "B" if S[1] == "R" else "R"
    ans = "A{}C".format(a)
    
    print(ans)


if __name__ == '__main__':
    main()

Solution (Python):
import sys
from collections import deque
import copy
def main():
    S = input()
    if S == "ABC":
        print("ARC")
    else:
        print("ABC")


if __name__ == '__main__':
    main()

Solution (Python):
a = input()
if a == "ABC":
    print("ARC")
elif a == "ARC":
    print("ABC")

Solution (Python):
s=input()
print('ARC') if s=='ABC' else print('ABC')

Solution (Python):
a = input()
print('ABC') if a == 'ARC' else print('ARC')

Solution (Python):
S=input()
if S=="ABC":
    print("ARC")
elif S=="ARC":
    print("ABC")

Solution (Python):
S = input()
print('ABC' if S == 'ARC' else 'ARC')

Solution (Python):
if input() == "ABC":
    print("ARC")
else:
    print("ABC")

Solution (Python):
def main():
    s = input()
    if s == "ABC":
        print("ARC")
    else:
        print("ABC")

    return


if __name__ == "__main__":
    main()

Solution (Python):
print("ABC" if input().strip() == "ARC" else "ARC")

Solution (Python):
def solve(string):
    return "ABC" if "R" in string else "ARC"


if __name__ == '__main__':
    import sys
    print(solve(sys.stdin.read().strip()))

Solution (Python):
S = str(input())

if S == 'ABC':
  print('ARC')
else:
  print('ABC')

Solution (Python):
S=input()

if S == "ABC":
  print("ARC")
else:
  print("ABC")

Solution (Python):
S = input()
if S == "ABC":
  print("ARC")
elif S == "ARC":
  print("ABC")

Solution (Python):
S = input()
print("ARC" if (S == "ABC") else "ABC")

Solution (Python):
if input() == 'ABC':
  print('ARC')
else:
  print('ABC')

Solution (Python):
s = input()
if s == "ABC":
    print("ARC")
else:
    print("ABC")

Solution (Python):
s = input()

if (s == 'ABC'):
    print('ARC')
elif (s == 'ARC'):
    print('ABC')
else:
    print('')

Solution (Python):
S = input()

if S == 'ABC':
  print('ARC')
else:
  print('ABC')

Solution (Python):
S=input()
print("ABC" if S=="ARC" else "ARC")

Solution (Python):
S = input()
A = "ABC"
R = "ARC"
if S == "ABC":
  print(R)
else:
  print(A)

Solution (Python):
print("ABC" if input() == "ARC" else "ARC")

Solution (Python):
s = input()
print("ABC" if s=="ARC" else "ARC")

Solution (Python):
s=input()
if s == 'ARC':
  print('ABC')
else:
  print('ARC')

Solution (Python):
if __name__ == '__main__':
    s = input()

    if s == "ABC":
        print("ARC")
    if s == "ARC":
        print("ABC")

Solution (Python):
s = input()

if s == "ABC":
    print("ARC")
elif s == "ARC":
    print("ABC")

Solution (Python):
inp = input()
print("ABC" if inp == "ARC" else "ARC")

Solution (Python):
S = input()
print("ABC" if S == "ARC" else "ARC")

Solution (Python):
S=input()
print("ABC" if S=="ARC" else "ARC")

Solution (Python):
x = input()

if x == "ABC":
    print("ARC")
else:
    print("ABC")

Solution (Python):
c = input()

if c == "ARC":
    print("ABC")

elif c == "ABC":
    print("ARC")

Solution (Python):
S = input()
result = ""

if S == "ABC":
    result = "ARC"
else:
    result = "ABC"

print(result)

Solution (Python):
x = str(input())
if x == "ABC":
  print("ARC")
else:
  print("ABC")

Solution (Python):
s = input()

if s == 'ABC':
	print('ARC')
else:
	print('ABC')

Solution (Python):
S = input()

print("ARC" if S == "ABC" else "ABC")

Solution (Python):
print('ABC' if input()=='ARC' else 'ARC')

Solution (Python):
S = input()
if S == 'ABC':
  print('ARC')
else:
  print('ABC')

Solution (Python):
print('A'+('B'if input()=='ARC' else'R')+'C')

Solution (Python):
s=input()
print('A'+('B'if s[1]=='R' else'R')+'C')

Solution (Python):



def main():
    s = input()

    if s == "ABC":
        print("ARC")
    else:
        print("ABC")


if __name__ == '__main__':
    main()

Solution (Python):
S = input()
if S == "ABC":
    print('ARC')
else:
    print('ABC')

Solution (Python):

S = input()
if S == "ABC":
    print('ARC')
else:
    print('ABC')

Solution (Python):
s = input()
print('ARC') if s=='ABC' else print('ABC')

Solution (Python):
contest=input()
if contest == 'ABC':
    print('ARC')
elif contest == 'ARC':
    print('ABC')

Solution (Python):


s = input()

print('ARC' if s == 'ABC' else 'ABC')

Solution (Python):
s = input()

if s=='ABC':
    print('ARC')
else:
    print('ABC')

Solution (Python):
S = input()
if S == 'ABC':
    print("ARC")
else:
    print("ABC")

Solution (Python):
S = input()
if S == "ABC":
    print("ARC")
elif S == "ARC":
    print("ABC")

Solution (Python):
s=input()

if s=="ABC":
  print("ARC")
else:
  print("ABC")

Solution (Python):
s = input()

if s == "ABC":
  print("ARC")
else:
  print("ABC")

Solution (Python):
s = input()
print("ARC" if s == "ABC" else "ABC")

Solution (Python):
s = input()
if s == "ARC":
    print("ABC")
    
else: print("ARC")

Solution (Python):
print('ARC' if input() == 'ABC' else 'ABC')

Solution (Python):
s = input()
if s == "ABC":
  print("ARC")
else:
  print("ABC")

Solution (Python):
name = input()
if "ABC" == name:
    print("ARC")
else:
    print("ABC")

Solution (Python):
S = input()
if S == "ABC":
    print("ARC")
else:
    print("ABC")

Solution (Python):
s = input()
if s == "ARC":
    print("ABC")
else:
    print("ARC")

Solution (Python):
import sys
input = sys.stdin.readline

S = input().rstrip()
if S == "ABC":
    print("ARC")
else:
    print("ABC")

Solution (Python):
s=input()
if s=="ABC":
    print("ARC")
else:
    print("ABC")

Solution (Python):
n=input()

if (n =="ABC"):
    print("ARC")
else:
    print("ABC")

Solution (Python):
print("ARC" if input() == "ABC" else "ABC")

Solution (Python):
S = input()
if S == "ABC":
  print("ARC")
else:
  print("ABC")

Solution (Python):
S = str(input())

if S=="ABC":
    print("ARC")
else:
    print("ABC")

Solution (Python):
s = input()
if s == "ABC":
	print("ARC")
else:
	print("ABC")

Solution (Python):
a = input()
if a == "ARC":
  print("ABC")
else:
  print("ARC")

Solution (Python):
S = input()

if S == 'ABC':
    print('ARC')
elif S == 'ARC':
    print('ABC')

Solution (Python):
s=input()
if s=='ABC':
    print('ARC')
else:
    print('ABC')

Solution (Python):
s = input()
if s == "ABC":
    print("ARC")
else:
    print("ABC")

Solution (Python):

s = input()

if s == "ABC":
    print("ARC")

else:
    print("ABC")

Solution (Python):
S = input()
if S == "ABC":
  print("ARC")
else:
  print('ABC')

Solution (Python):
S = input()
if S == "ABC":
  print("ARC")
else:
  print('ABC')

Solution (Python):
S = input()
print("ABC" if S == "ARC" else "ARC")

Solution (Python):
s = input()
if s == "ABC":
  print("ARC")
else:
  print("ABC")

Solution (Python):
print('A'+'BR'[input()=='ABC']+'C')

Solution (Python):
S = input()
ans = ""
if S[1]=="R":
    ans = "ABC"
elif S[1]=="B":
    ans = "ARC"

print(ans)

Solution (Python):
s = input()
if s[1] == 'B':
  print("ARC")
else:
  print("ABC")

Solution (Python):
S = input()
if S == 'ARC':
  print('ABC')
else:
  print('ARC')

Solution (Python):
s = input()
if s == "ABC":
    print("ARC")
else:
    print("ABC")

Solution (Python):
S=str(input())

if S=="ABC":
  print("ARC")
else:
  print("ABC")

Solution (Python):
a=input()
print(a[0]+("B" if a[1] == "R" else "R")+a[2])

Solution (Python):
S = input()
if S == "ABC": print ("ARC")
else: print ("ABC")

Solution (Python):
a = input('')
if a == 'ABC':
    print('ARC')
if a == 'ARC':
    print('ABC')

Solution (Python):

s = input()
if s == 'ABC':
    print('ARC')
else:
    print('ABC')

Solution (Python):
S = input()

if S == "ABC":
    print("ARC")
else:
    print("ABC")

Solution (Python):
s=input()
if(s[1]=='R'):
  print("ABC")
else:
  print("ARC")

Solution (Python):
print("ABC" if input() == "ARC" else "ARC")

Solution (Python):
S=input()
if S=="ABC":
    print("ARC")
else:
    print("ABC")

Solution (Python):
s=input()

if s[1]=="B":
  print("ARC")
else:
  print("ABC")

Solution (Python):
last_name = input()
last_type = last_name[:3]
 
if last_type == "ABC":
  print("ARC")
else:
  print("ABC")

Solution (Python):
s = input()
if s == "ABC":
  print("ARC")
else:
  print("ABC")

Solution (Python):
s = input()
if s == "ABC":
    print("ARC")
else:
    print("ABC")

Solution (Python):
S = input()
if S == 'ABC':
    print('ARC')

else:
    print('ABC')

Solution (Python):
s = input()

if s == "ABC":
  print("ARC")
else:
  print("ABC")

Solution (Python):
S = input()
print('ARC' if S == 'ABC' else 'ABC')

Solution (Python):
S = input()

if S == 'ARC' :
    print('ABC')
elif S == 'ABC' :
    print('ARC')

Solution (Python):
S = input()

print('ABC' if S == 'ARC' else 'ARC')

Solution (Python):
S = input()
print('ABC' if S == 'ARC' else 'ARC')

Solution (Python):
result = 'ARC' if input() == 'ABC' else 'ABC'
print(result)

Solution (Python):
N = input()
if N == "ABC":
  print("ARC")
else:
  print("ABC")

Solution (Python):
S=input()

if S=='ABC':
    print('ARC')
else:
    print('ABC')

Solution (Python):
S = input()
if S == "ABC":
    print("ARC")
else:
    print("ABC")

Solution (Python):
if input() == "ABC":
  print("ARC")
else:
  print("ABC")

Solution (Python):
A=input()
if A == "ARC":
  print("ABC")
else:
  print("ARC")

Solution (Python):
import math
import sys

stdin = sys.stdin

ns = lambda: stdin.readline().rstrip()
ni = lambda: int(stdin.readline().rstrip())
nm = lambda: map(int, stdin.readline().split())
nl = lambda: list(map(int, stdin.readline().split()))
mod = 10**9 + 7 
sys.setrecursionlimit(1000010)

S = ns()
if S == 'ABC':
    print('ARC')
else:
    print('ABC')

Solution (Python):
string=input()
if string == 'ABC':
  print('ARC')
else:
  print('ABC')

Solution (Python):
s = input()

if s == "ABC":
    print("ARC")
else:
    print("ABC")

Solution (Python):
x = str(input())
if x == 'ABC':
    print("ARC")
else:
    print("ABC")

Solution (Python):


S = input()

if S == "ABC":
    print("ARC")
else:
    print("ABC")

Solution (Python):
str =input()
if str == "ABC":
 print("ARC")
else:
 print("ABC")

Solution (Python):
s = input()

if s == 'ABC':
  print('ARC')
else:
  print('ABC')

Solution (Python):
s=input();
if s[1]=='B':
	print('ARC')
else:
	print("ABC")

Solution (Python):
S = input()
if S == "ABC":
  print("ARC")
else:
  print("ABC")

Solution (Python):
S = input()
if S == "ABC":
  print("ARC")
else:
  print("ABC")

Solution (Python):
S=input()
if S=="ABC":
    print("ARC")
else:
    print("ABC")

Solution (Python):
s = input()
if s == "ABC":
  print("ARC")
else:
  print("ABC")

Solution (Python):
s = input()
print("ARC" if s == "ABC" else "ABC")

Solution (Python):
S = input()

print('ABC' if S == 'ARC' else 'ARC')

Solution (Python):
name = input()

if name == "ABC":
    print("ARC")
else:
    print("ABC")

Solution (Python):
X = input()
print("ARC" if X == "ABC" else "ABC")

Solution (Python):
S = input()
if S =='ABC':
    print('ARC')
else:
    print('ABC')

Solution (Python):
print("ABC" if input()=="ARC" else "ARC")

Solution (Python):
a = input()

if a == 'ABC':
  print('ARC')

elif a == 'ARC':
  print ('ABC')

Solution (Python):
S = input()

if S == "ABC":
  print("ARC")
else:
  print("ABC")

Solution (Python):
s = input()

if s == 'ABC':
    print('ARC')
else:
    print('ABC')

Solution (Python):
S = input()
if S == "ABC":
    print("ARC")
else:
    print("ABC")

Solution (Python):
s = input()
if s[1] == 'B':
  print('ARC')
else:
  print('ABC')

Solution (Python):
S=input()
if S=="ABC":
  print("ARC")
elif S=="ARC":
  print("ABC")

Solution (Python):
s=input()
if s=='ABC':
    print('ARC')
else:
    print('ABC')

Solution (Python):
S=input()
if S=="ABC":
  print("ARC")
elif S=="ARC":
  print("ABC")

Solution (Python):
if input()[1]=="B":
    print("ARC")
else:
    print("ABC")

Solution (Python):
contest = input()
if contest == "ABC":
    print("ARC")
else:
    print("ABC")

Solution (Python):
S=input()
if(S=='ABC'):
    print("ARC")
else:
    print('ABC')

Solution (Python):
S = input()
print('ABC' if S=='ARC' else 'ARC')

Solution (Python):
s = input()

m = s[1]

if m == "B":
    print('ARC')
else:
    print('ABC')

Solution (Python):
S=input()

if S=='ABC':
    print("ARC")
else:
    print("ABC")

Solution (Python):
S = input()

if S == 'ABC':
  print('ARC')
else:
  print('ABC')

Solution (Python):
s = input()
if s == "ABC":
    print("ARC")
else:
    print ("ABC")

Solution (Python):
s=input()
if s=='ABC':
    print('ARC')
else:
    print('ABC')

Solution (Python):
S = input()

if S == 'ABC':
    print('ARC')
else:
    print('ABC')

Solution (Python):
from math import sqrt

s = input()
if(s == "ABC"):
    print("ARC")
else:
    print("ABC")

Solution (Python):
S=input()
if S=="ABC":
  print("ARC")
else:
  print("ABC")

Solution (Python):
if input()=="ABC":
  print("ARC")
else:
  print("ABC")

Solution (Python):

"""
Spyderエディタ

これは一時的なスクリプトファイルです
"""

contest = {'ABC':'ARC', 'ARC':'ABC'}
print(contest[input()])

Solution (Python):
s =str(input())

if s=="ABC":
  print("ARC")
else:
  print("ABC")

Solution (Python):
s = input()
print("ARC") if s == "ABC" else print("ABC")

Solution (Python):
s = input()
print("ABC" if s == "ARC" else "ARC")

Solution (Python):
S=input()
if S=="ABC":
  print("ARC")
else:
  print("ABC")

Solution (Python):
print("ABC" if input() == "ARC" else "ARC")

Solution (Python):
s=input()
if s=='ABC':
    print('ARC')
else:
    print('ABC')

Solution (Python):
import itertools
import math
import fractions
import functools

s = input()
if s == "ABC":
    print("ARC")
else:
    print("ABC")

Solution (Python):
s = input()

if s == "ARC":
  print("ABC")
else:
  print("ARC")

Solution (Python):
a =input()
if a == "ABC":
  print("ARC")
elif a =="ARC":
  print("ABC")

Solution (Python):
s = input()

if s == 'ABC':
    print('ARC')
else:
    print('ABC')

Solution (Python):
s = input()
res = "ABC" if s == "ARC" else "ARC"
print(res)

Solution (Python):
s = input()
if(s=="ARC"):
    print("ABC")
else:
    print("ARC")

Solution (Python):
result = 'ARC' if input() == 'ABC' else 'ABC'
print(result)

Solution (Python):
def main(s):
    contests = ['ABC', 'ARC']
    contests.remove(s)
    return contests[0]


if __name__ == '__main__':
    S = input().rstrip()
    print(main(S))

Solution (Python):
S = input()
if S == 'ARC':
    print('ABC')
elif S == 'ABC':
    print('ARC')
else:
    False

Solution (Python):
print("ABC" if input()=="ARC" else "ARC")

Solution (Python):
s=input()
if(s[1]=='B'):
  print('ARC')
else:
  print('ABC')

Solution (Python):
str = input()

if str == "ABC":
    print("ARC")
else:
    print("ABC")

Solution (Python):
print("ABC" if input()=="ARC" else "ARC")

Solution (Python):
S = input()

if S == 'ARC':
    print('ABC')
else:
    print('ARC')

Solution (Python):
last = input()

if (last == 'ABC'):
    print('ARC')
else:
    print('ABC')

Solution (Python):
S=str(input())
if S=='ABC':
    print('ARC')
else:
    print('ABC')

Solution (Python):
a=input()
if a=="ABC":
  print("ARC")
else:
  print("ABC")

Solution (Python):
s = input()

if s == 'ABC':
	print('ARC')
else:
    print('ABC')

Solution (Python):
s = input()
if(s == 'ABC'):
  print('ARC')
else:
  print('ABC')

Solution (Python):
S = input()
if S == "ABC":
    print("ARC")
else:
    print("ABC")

Solution (Python):
s = input()

if s == 'ABC':
    print('ARC')
else:
    print('ABC')

Solution (Python):
S = input()
if S == "ABC":
  print("ARC")
else:
  print("ABC")

Solution (Python):
def main():

    S = input()
    if S == "ARC":
        return "ABC"
    return "ARC"

if __name__ == '__main__':
    print(main())

Solution (Python):
print("AABRCC"[input()=="ABC"::2])

Solution (Python):
S = input()
if S == 'ABC':
    print('ARC')
else:
    print('ABC')

Solution (Python):
s = input()
if s == "ABC":
  print("ARC")
else:
  print("ABC")

Solution (Python):
print("ABC" if input() == "ARC" else "ARC")

Solution (Python):
s=input()
if s=="ABC":
    print('ARC')
else:
    print('ABC')

Solution (Python):

import sys

def main():
    S = input()
    print(['ABC','ARC'][S == 'ABC'])

if __name__ == '__main__':
    main()

Solution (Python):
print({"ARC":"ABC", "ABC":"ARC"}[input()])

Solution (Python):
import sys
input = sys.stdin.readline

s = input().rstrip()

if s == "ARC":
    print("ABC")
else:
    print("ARC")

Solution (Python):
s = input()
if s[1]=="B":
    print("ARC")
else:
    print("ABC")

Solution (Python):
s = input()
print('ABC' if s == 'ARC' else 'ARC')

Solution (Python):
s = input()
if s == 'ABC':
    print('ARC')
else:
    print('ABC')

Solution (Python):
print({"ARC":"ABC", "ABC":"ARC"}[input()])

Solution (Python):

import sys, math, itertools, collections, bisect
input = lambda: sys.stdin.buffer.readline().rstrip().decode('utf-8')
inf = float('inf') ;mod = 10**9+7
mans = inf ;ans = 0 ;count = 0 ;pro = 1

s = input()
if s == "ABC":
  print("ARC")
else:
  print("ABC")

Solution (Python):

import sys, math, itertools, collections, bisect
input = lambda: sys.stdin.buffer.readline().rstrip().decode('utf-8')
inf = float('inf') ;mod = 10**9+7
mans = inf ;ans = 0 ;count = 0 ;pro = 1

s = input()
if s == "ABC":
  print("ARC")
else:
  print("ABC")

Solution (Python):
N = str(input())

if N == "ABC":
    print("ARC")
else:
    print("ABC")

Solution (Python):
s = input()
if s == "ABC":
  print("ARC")
else:
  print("ABC")

Solution (Python):
def main():
    S = str(input())
    if S == "ABC":
        print("ARC")
    elif "ARC":
        print("ABC")

if __name__=="__main__":
    main()

Solution (Python):
def main():
    S = str(input())
    if S == "ABC":
        print("ARC")
    elif "ARC":
        print("ABC")

if __name__=="__main__":
    main()

Solution (Python):
a=input()
if a=='ABC':
	print('ARC')
else:
	print('ABC')

Solution (Python):
s=input()
if s=="ABC":
    print("ARC")
else:
    print("ABC")

Solution (Python):
print("ARC" if input() == "ABC" else "ABC")

Solution (Python):
if input() == "ABC":
    print("ARC")
else:
    print("ABC")

Solution (Python):



S = input()


if S=="ABC":
    print("ARC")
else:
    print("ABC")

Solution (Python):
from sys import stdin

s = stdin.readline().rstrip()

if s == 'ABC':
  print('ARC')
else:
  print('ABC')

Solution (Python):
str = input()
if str == 'ABC':
     print("ARC")
elif str == 'ARC':
    print('ABC')

Solution (Python):
print({"ABC":"ARC", "ARC": "ABC"}[input()])

Solution (Python):
print({"ABC":"ARC", "ARC": "ABC"}[input()])

Solution (Python):
print({"ABC":"ARC", "ARC": "ABC"}[input()])

Solution (Python):
S = input()

if S=='ABC':
    print('ARC')
else:
    print('ABC')

Solution (Python):
S = input()

if S == "ABC":
    print("ARC")
else:
    print("ABC")

Solution (Python):
s = input()
if s=='ABC':
  print('ARC')
else:
  print('ABC')

Solution (Python):
S = input()

if S == "ABC":
    print("ARC")
elif S == "ARC":
    print("ABC")

Solution (Python):
s = input()
ans = "ABC"
if s =="ABC":
    ans = "ARC"
print(ans)

Solution (Python):
s = input()

if s=="ABC":
    print("ARC")
else:
    print("ABC")

Solution (Python):
s = input()
if s == "ABC":
  print("ARC")
else:
  print("ABC")

Solution (Python):
contests = {"ARC":"ABC", "ABC":"ARC"}

print(contests[input()])

Solution (Python):
s = input()

if s == "ABC":
    print("ARC")
elif s == "ARC":
    print("ABC")

Solution (Python):
import sys

s = input()

if s == "ARC":
    print("ABC")
else :
    print("ARC")

Solution (Python):
import sys

sys.setrecursionlimit(10**7)

stdin = sys.stdin

ni = lambda: int(ns())
na = lambda: list(map(int, stdin.readline().split()))
ns = lambda: stdin.readline().rstrip()  

s = input()
if s == 'ABC':
    print('ARC')
else:
    print('ABC')

Solution (Python):


S = input()

if S == "ABC":
    print("ARC")
else:
    print("ABC")

Solution (Python):
if input()=="ABC":
  print("ARC")
else:
  print("ABC")

Solution (Python):
print("ARC" if str(input()) =="ABC"  else "ABC")

Solution (Python):
n = input()
if n=="ABC":print("ARC")
else:print("ABC")

Solution (Python):
"""
~~ author : dokueki
~~ created : 10~05~2020
"""

import sys
INT_MAX = sys.maxsize
INT_MIN = -(sys.maxsize)-1
sys.setrecursionlimit(10**7)
mod = 1000000007


def IOE():
    sys.stdin = open("input.txt", "r")
    sys.stdout = open("output.txt", "w")


def main():
    s = input()
    print("ARC" if s=="ABC" else "ABC")

if __name__ == "__main__":
    try:
        IOE()
    except:
        pass
    main()

Solution (Python):
S = input()
if S == "ABC":
    print("ARC")
else:
    print("ABC")

Solution (Python):
s = input()
if s == "ABC":
  print("ARC")
else:
  print("ABC")

Solution (Python):
s = input()
if s == 'ABC':
  print('ARC')
else:
  print('ABC')

Solution (Python):
S=input()
if S=='ABC':
  print('ARC')
else:
  print('ABC')

Solution (Python):
S = input()


if S == "ABC":
    print("ARC")
if S == "ARC":
    print("ABC")

Solution (Python):
S = input()
if S == 'ABC':
    print('ARC')
else:
    print('ABC')

Solution (Python):
s=input()
if s=="ABC":
    print("ARC")
else:
    print("ABC")

Solution (Python):
print("ABC" if input() == "ARC" else "ARC")

Solution (Python):
s = input()
if s == 'ABC':
  print('ARC')
else:
  print('ABC')

Solution (Python):
a = input()
if a == "ABC":
	print("ARC")
else:
	print("ABC")

Solution (Python):
from sys import stdin

S = stdin.readline().rstrip()

if S == 'ABC':
    print('ARC')
else:
    print('ABC')

Solution (Python):
str = input()
if str == "ABC":
    print("ARC")
else:
    print("ABC")

Solution (Python):
a = input()
if a == 'ABC':
  print('ARC')
else:
  print('ABC')

Solution (Python):
if "B" in input(): print("ARC")
else: print("ABC")

Solution (Python):
tw ="ABC" if input().startswith("ARC") else "ARC"
print(tw)

Solution (Python):
a=input()

if a=='ABC':
  print('ARC')
  
else:
  print('ABC')

Solution (Python):
S = input()

if S == 'ABC':
  print('ARC')
else:
  print('ABC')

Solution (Python):
a = input()

if a == 'ABC':
  print('ARC')
else:
  print('ABC')

Solution (Python):

import sys
sys.setrecursionlimit(10**7)


N = input().rstrip()

if N == "ABC":
    print("ARC")
else:
    print("ABC")

Solution (Python):
s = input()

if s == "ABC": print("ARC")
else: print("ABC")

Solution (Python):
S = input()

if S == "ABC":
    print("ARC")
else:
    print("ABC")

Solution (Python):
s = input()

if s == 'ABC':
    print('ARC')
else:
    print('ABC')

Solution (Python):
p=input()
if p=='ABC':
  print('ARC')
else:
  print('ABC')

Solution (Python):
i = input()
if i == "ABC":
  print("ARC")
elif i == "ARC":
  print("ABC")

Solution (Python):
s = input()

if s[1] == 'R':
    print("ABC")

else:
    print("ARC")

Solution (Python):
S=input()
if S == 'ARC':
    print('ABC')
if S == 'ABC':
    print('ARC')

Solution (Python):
s=input()
if s=="ABC":
    print("ARC")
else:
    print("ABC")

Solution (Python):
s = input()

if s == "ABC":
    print("ARC")
else:
    print("ABC")

Solution (Python):
S = input()
if S[1] == 'R':
	print('ABC')
else:
    print('ARC')

Solution (Python):
S=input()
if S[1]=="B":
    print("ARC")
else:
    print("ABC")

Solution (Python):
S = input()
if S == "ABC":
  print("ARC")
else:
  print("ABC")

Solution (Python):
S = str(input())
if S == "ABC":
    print("ARC")
else:
    print("ABC")

Solution (Python):
N=input()

if N=="ARC":
  print("ABC")
  
else:
  print("ARC")

Solution (Python):
str = input()
if str == "ARC":
  print("ABC")
else:
  print("ARC")

Solution (Python):


S = input()


def main() -> None:
    """Entry point
    """
    
    """
    先週"ABC"が開催された場合は"ARC"、
    先週"ARC"が開催された場合は"ABC"を返す
    """
    result = ""
    if S == "ABC":
        result = "ARC"
    elif S == "ARC":
        result = "ABC"

    
    print(result)


if __name__ == "__main__":
    main()

Solution (Python):
s = input()
if s == 'ABC':
    print('ARC')
else:
    print('ABC')

Solution (Python):

import sys

import heapq
import re
import bisect
import random
import math
import itertools
from collections import defaultdict, deque
from copy import deepcopy
from decimal import *

readl= lambda: list(map(int, sys.stdin.readline().split()))
readt= lambda: tuple(map(int, sys.stdin.readline().split()))
read = lambda: sys.stdin.readline().rstrip()
readi = lambda: int(read())
readmi = lambda: map(int, sys.stdin.readline().split())
readms = lambda: map(str, sys.stdin.readline().split())

s = read()
if s == "ARC":
    print("ABC")
else:
    print("ARC")

Solution (Python):
a = str(input())
if a == 'ABC':
  print('ARC')
else:
  print('ABC')