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):



import sys  
import os
import time
import re
from pydoc import help
import string
import math
from operator import itemgetter
from collections import Counter
from collections import deque
from collections import defaultdict as dd
import fractions
from heapq import heappop, heappush, heapify
import array
from bisect import bisect_left, bisect_right, insort_left, insort_right
from copy import deepcopy as dcopy
import itertools



sys.setrecursionlimit(10**7)
INF = 10**20
GOSA = 1.0 / 10**10
MOD = 10**9+7
ALPHABETS = [chr(i) for i in range(ord('a'), ord('z')+1)]  
def LI(): return [int(x) for x in sys.stdin.readline().split()]
def LI_(): return [int(x)-1 for x in sys.stdin.readline().split()]
def LF(): return [float(x) for x in sys.stdin.readline().split()]
def LS(): return sys.stdin.readline().split()
def I(): return int(sys.stdin.readline())
def F(): return float(sys.stdin.readline())
def DP(N, M, first): return [[first] * M for n in range(N)]
def DP3(N, M, L, first): return [[[first] * L for n in range(M)] for _ in range(N)]
from inspect import currentframe


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

    return 0

if __name__ == "__main__":
    solve()

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


if __name__ == '__main__':
    Qa()

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

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

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

if __name__ == "__main__":
    solve()

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


if __name__ == '__main__':
    main()

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

Solution (Python):
S = input()
T = 'R' if S[1] == 'B' else 'B'
print(S[0]+T+S[2])

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

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

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

Solution (Python):
ini = lambda : int(input())
inm = lambda : map(int,input().split())
inl = lambda : list(map(int,input().split()))
gcd = lambda x,y : gcd(y,x%y) if x%y else y
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 make_divisors(n):
    divisors = []
    for i in range(1, int(n**0.5)+1):
        if n % i == 0:
            divisors.append(i)
            if i != n // i:
                divisors.append(n//i)
    divisors.sort()
    return divisors

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

Solution (Python):
S = input()

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

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

Solution (Python):
d = ["ABC", "ARC"]
s = input()
print(d[1 - d.index(s)])

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):
print(f"A{['B', 'R'][input() == 'ABC']}C")

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

Solution (Python):

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

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

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

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

if __name__ == "__main__":
    resolve()

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 = 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):

X = input()
print(X == "ABC" and "ARC" or "ABC")

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

Solution (Python):
contenst_table = {
    'ABC': 'ARC',
    'ARC': 'ABC'
}

last_week_contest = input()

print(contenst_table[last_week_contest])

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=="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):
s = input()

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

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

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

Solution (Python):
s = input()
dict_contest = {'ABC':'ARC', 'ARC':'ABC'}
print(dict_contest.get(s))

Solution (Python):
S = input()

if S[1:2] == "R":
  print("ABC")
else:
  print("ARC")

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

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

Solution (Python):
A=input()

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

Solution (Python):
print("ABC"if input()=="ARC"else "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):
def main():
    cands = {'ABC', 'ARC'}

    S = input()
    cands.discard(S)

    print(cands.pop())


if __name__ == '__main__':
    main()

Solution (Python):
s = input()

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

Solution (Python):
S = input()

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

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

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

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

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

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

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

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

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

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")
elif(S=="ARC"):
  print("ABC")  
else:
    print("error")

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

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

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

Solution (Python):
print(input() == "ABC" and "ARC" or "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 == "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):
s = input()

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

Solution (Python):


def main():

    S = input()

    if S == 'ABC':
        ans = 'ARC'
    
    else:
        ans = 'ABC'

    print(ans)


if __name__ == "__main__":
    main()

Solution (Python):
































global FLAG_LOG
FLAG_LOG = False


def log(value):
    
    
    if FLAG_LOG:
        print(str(value))


def calculation(lines):
    S = lines[0]
    
    
    
    
    
    
    
    
    
    

    result = 'ABC'
    if S == 'ABC':
        result = 'ARC'

    return [result]



def get_input_lines(lines_count):
    lines = list()
    for _ in range(lines_count):
        lines.append(input())
    return lines



def get_testdata(pattern):
    if pattern == 1:
        lines_input = ['ABC']
        lines_export = ['ARC']
    return lines_input, lines_export



def get_mode():
    import sys
    args = sys.argv
    global FLAG_LOG
    if len(args) == 1:
        mode = 0
        FLAG_LOG = False
    else:
        mode = int(args[1])
        FLAG_LOG = True
    return mode



def main():
    import time
    started = time.time()
    mode = get_mode()
    if mode == 0:
        lines_input = get_input_lines(1)
    else:
        lines_input, lines_export = get_testdata(mode)

    lines_result = calculation(lines_input)

    for line_result in lines_result:
        print(line_result)

    
    
    
    
    
    
    
    
    
    
    



if __name__ == '__main__':
    main()

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

Solution (Python):
S = input()

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

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

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

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

print(ans[S])

Solution (Python):

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

Solution (Python):
import sys

S = input()

if not ( S == 'ABC' or S == 'ARC' ): sys.exit()

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

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

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

if __name__ == "__main__":
  main()

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

if __name__ == "__main__":
    main()

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

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

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

Solution (Python):
S=input()

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

Solution (Python):
import sys

read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

S = read().rstrip().decode()
x = ['ABC', 'ARC']
x.remove(S)
print(x[0])

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):
if input() == "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):
N = input()

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

Solution (Python):
s = {'ABC': 'ARC', 'ARC': 'ABC'}
print(s[input()])

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):


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

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

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

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

print(ans)

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

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

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

Solution (Python):
import sys 
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines
S = readline().decode().rstrip()
if S == 'ABC':
    print('ARC')
else:
    print('ABC')

Solution (Python):
s = input()

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

Solution (Python):
word = input()

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

Solution (Python):
s = {input()}
test = {'ABC', 'ARC'}
print(list(test - s)[0])

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

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

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):

from collections import defaultdict, Counter
from itertools import product, groupby, count, permutations, combinations
from math import pi, sqrt
from collections import deque
from bisect import bisect, bisect_left, bisect_right
from string import ascii_lowercase
from functools import lru_cache
import sys
sys.setrecursionlimit(10000)
INF = float("inf")
YES, Yes, yes, NO, No, no = "YES", "Yes", "yes", "NO", "No", "no"
dy4, dx4 = [0, 1, 0, -1], [1, 0, -1, 0]
dy8, dx8 = [0, -1, 0, 1, 1, -1, -1, 1], [1, 0, -1, 0, 1, 1, -1, -1]


def inside(y, x, H, W):
    return 0 <= y < H and 0 <= x < W


def ceil(a, b):
    return (a + b - 1) // b


def sum_of_arithmetic_progression(s, d, n):
    return n * (2 * s + (n - 1) * d) // 2


def gcd(a, b):
    if b == 0:
        return a
    return gcd(b, a % b)


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


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


def main():
    solve()


if __name__ == '__main__':
    main()

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

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

Solution (Python):






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

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):
def main():
    arg = input().rstrip()
    ans = 'ABC' if arg == 'ARC' else 'ARC'

    print(ans)


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

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

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

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

Solution (Python):

S = input()

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

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

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):
ct = input()

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

Solution (Python):
S = input()

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

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

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

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

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

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

Solution (Python):
X = input()

if (X == 'ABC'):
  print("ARC")
elif (X == 'ARC'):
  print("ABC")
else:
  print("NONE")

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 = raw_input()

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

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

s[1] = (s[1] == 'B') and 'R' or 'B'

a = ''.join(s)
print(a)

Solution (Python):
s = raw_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):
a = input()

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

Solution (Python):
a = input()

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

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

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

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

Solution (Python):
def c166(x):
    if x == "ABC": return "ARC"
    if x == "ARC": return "ABC" 



if __name__=="__main__":
    input1 = input()
    print(c166(input1))

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

Solution (Python):
s = input()

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

Solution (Python):
def main():
    print(list(set(["ABC", "ARC"])-{input()})[0])
        

if __name__ == "__main__":
    main()

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

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

Solution (Python):
S=input()

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

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

Solution (Python):
a = input()
if a == "ABC":
  print("ARC")
if a == "ARC":
  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):
def resolve():
    S = str(input())
    if S =='ABC':
        print('ARC')
    else:
        print('ABC')
    return

resolve()

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

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

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

Solution (Python):
S = input()
print(['ABC','ARC'][S == 'ABC'])

Solution (Python):
s=input()
ss=[0, "ABC", "ARC"]

if s==ss[1]:
    print(ss[-1])
else:
    print(ss[1])

Solution (Python):
a = list(input())
if a[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 = str(input())

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

Solution (Python):
s = input()

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

Solution (Python):
print {'ABC':'ARC', 'ARC': 'ABC'}[raw_input()]

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

Solution (Python):
import sys


def a_c(f):
    s = f.read().decode().strip()
    return 'ABC' if s == 'ARC' else 'ARC'


def main():
    ans = a_c(sys.stdin.buffer)
    print(ans)


if __name__ == '__main__':
    main()

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

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):
def readinput():
    s=input()
    return s

def main(s):
    if s=='ABC':
        return 'ARC'
    elif s=='ARC':
        return 'ABC'
    ans=''
    return ans

if __name__=='__main__':
    s=readinput()
    ans=main(s)
    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):
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')