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

Solution (Python):
s=input()

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

Solution (Python):

N = input()

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

print(asn)

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

Solution (Python):

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

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

Solution (Python):
s = input().rstrip()

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

Solution (Python):
string = input()

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

Solution (Python):
s = input()

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

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

Solution (Python):
S = raw_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 == 'ABC':
  print('ARC')
elif a == 'ARC':
  print('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")
else:
  print("ABC")

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

Solution (Python):


def main():
    s = input()

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

if __name__ == '__main__':
    main()

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

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

Solution (Python):
STR = input()

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

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

Solution (Python):
S = input()

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

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

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

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

Solution (Python):

def resolve():
    import sys
    input = sys.stdin.readline
    S = input().rstrip()

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



if __name__ == "__main__":
    resolve()

Solution (Python):


print(['ABC', 'ARC'][input() == '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):
pre = input()

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

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

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

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

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

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

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

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

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

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):
A=str(input())
if A=="ABC":
    print("ARC")
if A=="ARC":
    print("ABC")

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

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

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 = str(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[1] == 'B':
  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 == "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):
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 == "ARC":
	ans = "ABC"
else:
	ans = "ARC"
print(ans)

Solution (Python):
S=input()

def judge(S):
  if S=='ABC':
    return 'ARC'
  else:
    return 'ABC'
  
print(judge(S))

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


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

Solution (Python):

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

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

Solution (Python):
import math

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

Solution (Python):






import sys
input = sys.stdin.readline

import math
from collections import deque
from fractions import gcd
from functools import lru_cache






MOD = 10**9+7
INF = float('inf')






def inputI(): return int(input().strip())
def inputS(): return input().strip()
def inputIL(): return list(map(int,input().split()))
def inputSL(): return list(map(str,input().split()))
def inputILs(n): return list(int(input()) for _ in range(n))
def inputSLs(n): return list(input().strip() for _ in range(n))
def inputILL(n): return [list(map(int, input().split())) for _ in range(n)]
def inputSLL(n): return [list(map(str, input().split())) for _ in range(n)]


def inv(n): return pow(n, MOD-2, MOD)


kaijo_memo = []
def kaijo(n):
  if(len(kaijo_memo) > n):
    return kaijo_memo[n]
  if(len(kaijo_memo) == 0):
    kaijo_memo.append(1)
  while(len(kaijo_memo) <= n):
    kaijo_memo.append(kaijo_memo[-1] * len(kaijo_memo) % MOD)
  return kaijo_memo[n]

gyaku_kaijo_memo = []
def gyaku_kaijo(n):
  if(len(gyaku_kaijo_memo) > n):
    return gyaku_kaijo_memo[n]
  if(len(gyaku_kaijo_memo) == 0):
    gyaku_kaijo_memo.append(1)
  while(len(gyaku_kaijo_memo) <= n):
    gyaku_kaijo_memo.append(gyaku_kaijo_memo[-1] * pow(len(gyaku_kaijo_memo),MOD-2,MOD) % MOD)
  return gyaku_kaijo_memo[n]

def nCr(n,r):
  if(n == r):
    return 1
  if(n < r or r < 0):
    return 0
  ret = 1
  ret = ret * kaijo(n) % MOD
  ret = ret * gyaku_kaijo(r) % MOD
  ret = ret * gyaku_kaijo(n-r) % MOD
  return ret


def factorization(n):
    arr = []
    temp = n
    for i in range(2, int(-(-n**0.5//1))+1):
        if temp%i==0:
            cnt=0
            while temp%i==0:
                cnt+=1
                temp //= i
            arr.append([i, cnt])
    if temp!=1:
        arr.append([temp, 1])

    if arr==[]:
        arr.append([n, 1])
    return arr


def lcm(a, b):
    return a * b // gcd (a, b)





S = inputS()

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

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

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

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

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

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

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

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

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):
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):
x = input()

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

Solution (Python):
S = input()

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

Solution (Python):
import logging

logging.basicConfig(level=logging.INFO, format="%(message)s")


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")
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):
def main():
    S = input()
    return {'ABC': 'ARC', 'ARC': 'ABC'}[S]

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

Solution (Python):

s = input()


if (s == "ABC"):
    print("ARC")
if (s == "ARC"):
    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=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 "B" in S:
  print(S.replace("B", "R"))
elif "R" in S:
  print(S.replace("R", "B"))

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):
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[1] == 'R':
    print('ABC')
elif s[1] == 'B':
    print('ARC')

Solution (Python):
S = input()

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

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

Solution (Python):
contests = ['ABC', 'ARC']
S = input()
contests.remove(S)
print(contests[0])

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

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

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

Solution (Python):
s=input()

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

Solution (Python):
pre = input()

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

Solution (Python):
str=input()

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

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

Solution (Python):












N = input() 

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

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

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

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

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

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


main()

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

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

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

Solution (Python):

S = input()


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

Solution (Python):
s = list(input(''))

if s == ['A','B','C']:
    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 = str(input())
ans = ""
if s == "ABC":
    ans = "ARC"
else:
    ans = "ABC"
print(ans)

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

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

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

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

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

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

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

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

Solution (Python):
item = input()

if item == "ARC":
    print("ABC")
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 = str(input())

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

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

Solution (Python):
inputLine = input()

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

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

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

import sys
from io import StringIO
import unittest

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):
s=input()

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

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

Solution (Python):
n = input()
print(["ABC","ARC"][n=="ABC"])

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

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")
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 = input()

ans = "ABC"
if s == "ABC":
    ans = "ARC"

print(ans)

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

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

Solution (Python):
str1=input("")
if(str1=="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=="ARC":
  print("ABC")
else:
  print("ARC")

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

main()

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

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

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

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

Solution (Python):


last = input()
if last == '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[1] == 'R' else "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):

import sys

DEBUG = True if (len(sys.argv) > 1 and sys.argv[1] == "DEBUG") else False


def dp(value):
    if DEBUG:
        print(value)
    return


def input_text(split=" "):
    
    result = []
    while True:
        try:
            row = list(
                map(lambda x: int(x) if x.isdecimal() else x, input().split(split))
            )
            result.append(row)
        except EOFError:
            break
    return result



it = input_text()

s = it[0][0]
print("ABC" if s == "ARC" else "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):






import sys,bisect,math
sys.setrecursionlimit(15000)

s = sys.stdin.readline().rstrip()
if s == "ABC":
    print("ARC")
    exit()
print("ABC")

Solution (Python):
s=input()

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

Solution (Python):
s= str(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")
elif S == "ARC":
    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):

A = input()
if A == "ARC":
    print("ABC")
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 == "ARC":print("ABC")
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):
input_word = input()
if input_word == "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):
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):
S = str(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):
s = input()

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

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):


n = input()

if (n[0] == 'A') and (n[1] == 'B') and (n[2] == 'C'):
    print('ARC')

if (n[0] == 'A') and (n[1] == 'R') and (n[2] == 'C'):
    print('ABC')

Solution (Python):

last_week_name = input()
if last_week_name == "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()
print(["ABC", "ARC"][S == "ABC"])

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

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

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

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

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

Solution (Python):
def read():
    S = input()
    return S,

def solve(S):
    if S[1] == 'B':
        return 'ARC'
    else:
        return 'ABC'


if __name__ == '__main__':
    inputs = read()
    print((solve(*inputs)))

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

Solution (Python):


import sys
import math
import collections
import itertools
from inspect import currentframe
INF = 10 ** 10
MOD = 10 ** 9 + 7
def input() : return sys.stdin.readline().strip()
def gcd(x, y) : return y if x % y == 0 else gcd(y, x % y)
def lcm(x, y) : return (x * y) // gcd(x, y)
def I() : return int(input())
def LI() : return [int(x) for x in input().split()]
def RI(N) : return [int(input()) for _ in range(N)]
def LRI(N) : return [[int(x) for x in input().split()] for _ in range(N)]

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 = str(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")
if N=="ARC":
  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):
t = input()
if t == '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[1] == "B":
    print("ARC")
elif s[1] == "R":
    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):
S = input()

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

Solution (Python):
def main():
    S = input()

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



if __name__ == '__main__':
    main()

Solution (Python):
from sys import stdin


def get_result(data):
    S = data[0]
    return 'ARC' if S == 'ABC' else 'ABC'


if __name__ == '__main__':
    data = list(map(str, stdin.readline().rstrip().split(' ')))
    result = get_result(data)
    print(result)

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):
S = input()

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