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=str(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():

    
    
    

    
    
    

    
    first_input = input().split(" ")

    S = first_input[0]

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

if __name__ == '__main__':
    main()

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

Solution (Python):
import numpy as np

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

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


def main():
    S = input().strip()
    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):
import sys
from io import StringIO
import unittest

def resolve():
    s = input()

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

class TestClass(unittest.TestCase):
    def assertIO(self, input, output):
        stdout, stdin = sys.stdout, sys.stdin
        sys.stdout, sys.stdin = StringIO(), StringIO(input)
        resolve()
        sys.stdout.seek(0)
        out = sys.stdout.read()[:-1]
        sys.stdout, sys.stdin = stdout, stdin
        self.assertEqual(out, output)
    def test_入力例_1(self):
        input = """ABC"""
        output = """ARC"""
        self.assertIO(input, output)

if __name__ == "__main__":
    
    resolve()

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):
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):
import sys
input = sys.stdin.readline
def main():
    dic = {'ABC':'ARC', 'ARC':'ABC'}
    print(dic[input().rstrip()])

if __name__ == '__main__':
    main()

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

Solution (Python):


import sys
stdin = sys.stdin

def ns(): return stdin.readline().rstrip()
def ni(): return int(ns())
def na(): return list(map(int, stdin.readline().split()))

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

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

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

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

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

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

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

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

Solution (Python):
from collections import defaultdict
from math import gcd
import time
import sys
from collections import Counter
import itertools
import math
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines
start = time.time()

N = input()

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

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

Solution (Python):
if __name__ == '__main__':
    from sys import stdin
    
    import math
    input = stdin.readline

    

    a = input()[:3]
    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()
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")
elif S=="ARC":
  print("ABC")

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

Solution (Python):
S = input()

if "B" in S:
  print("ARC")
else:
  print("ABC")

Solution (Python):
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):
import math

if __name__ == "__main__":
    S = input()
    if S == "ARC":
        ret = "ABC"
    else:
        ret = "ARC"
    print(ret)

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

Solution (Python):
import sys
read = sys.stdin.read
readline = sys.stdin.readline
readlines = sys.stdin.readlines

def main():
    s = readline().strip()

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

N = str(input())

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

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

Solution (Python):
import math
import collections









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

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

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 collections import defaultdict,deque
import sys, bisect, math, itertools
from functools import lru_cache

sys.setrecursionlimit(10**8)
input = sys.stdin.readline
INF = float('inf')
mod = 10**9+7
eps = 10**-7
def inp():
    '''
    一つの整数
    '''
    return int(input())
def inpl():
    '''
    一行に複数の整数
    '''
    return list(map(int, input().split()))

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

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

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

if __name__ == '__main__':
    main()

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

Solution (Python):
_,s,_ = [i for i in input()]
if s=="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):
str = input()
if str == 'ABC':
  print('ARC')
if str == 'ARC':
  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):
import numpy as np
if __name__ == "__main__":
    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):
def main(S):
    lst = ['ABC', 'ARC']
    if S == lst[0]:
        print(lst[1])
    else:
        print(lst[0])

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

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

Solution (Python):
s =input()
if s[1] == 'B':
	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):
s = str(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):
def main(sample_file = ''):

    """ convenient functions
    
    
    
    
    
    """

    """convenient decorator
    
    
        
        
        
        
        
        
        
        
        
        
    """
    
    
    import sys
    sys.setrecursionlimit(10**7)
    from itertools import accumulate, combinations, permutations, product 
    
    from math import factorial, ceil, floor, sqrt
    def factorize(n):
        """return the factors of the Arg and count of each factor
        
        Args:
            n (long): number to be resolved into factors
        
        Returns:
            list of tuples: factorize(220) returns [(2, 2), (5, 1), (11, 1)]
        """
        fct = []  
        b, e = 2, 0  
        while b * b <= n:
            while n % b == 0:
                n = n // b
                e = e + 1
            if e > 0:
                fct.append((b, e))
            b, e = b + 1, 0
        if n > 1:
            fct.append((n, 1))
        return fct
    def combinations_count(n, r):   
        """Return the number of selecting r pieces of items from n kinds of items.
        
        Args:
            n (long): number
            r (long): number
        
        Raises:
            Exception: not defined when n or r is negative
        
        Returns:
            long: number
        """
        
        if n < 0 or r < 0:
            raise Exception('combinations_count(n, r) not defined when n or r is negative')
        if n - r < r: r = n - r
        if r < 0: return 0
        if r == 0: return 1
        if r == 1: return n
        numerator = [n - r + k + 1 for k in range(r)]
        denominator = [k + 1 for k in range(r)]
        for p in range(2,r+1):
            pivot = denominator[p - 1]
            if pivot > 1:
                offset = (n - r) % p
                for k in range(p-1,r,p):
                    numerator[k - offset] /= pivot
                    denominator[k] /= pivot
        result = 1
        for k in range(r):
            if numerator[k] > 1:
                result *= int(numerator[k])
        return result
    def combinations_with_replacement_count(n, r):
        """Return the number of selecting r pieces of items from n kinds of items allowing individual elements to be repeated more than once.
        
        Args:
            n (long): number
            r (long): number
        
        Raises:
            Exception: not defined when n or r is negative
        
        Returns:
            long: number
        """
        if n < 0 or r < 0:
            raise Exception('combinations_with_replacement_count(n, r) not defined when n or r is negative')
        elif n == 0:
            return 1
        else:
            return combinations_count(n + r - 1, r)
    from bisect import bisect_left, bisect_right
    from collections import deque, Counter, defaultdict 
    from heapq import heapify, heappop, heappush, heappushpop, heapreplace,nlargest,nsmallest 
    from copy import deepcopy, copy 
    import operator
    from operator import itemgetter 
    
    
    from functools import reduce, lru_cache
    def chmin(x, y):
        """change minimum
        if x > y, x = y and return (x, True).
        convenient when solving problems of dp[i]
        
        Args:
            x (long): current minimum value
            y (long): potential minimum value
        
        Returns:
            (x, bool): (x, True) when updated, else (x, False)
        """
        if x > y:
            x = y
            return (x, True)
        else:
            return (x, False)
    def chmax(x, y):
        """change maximum
        if x < y, x = y and return (x, True).
        convenient when solving problems of dp[i]
        
        Args:
            x (long): current maximum value
            y (long): potential maximum value
        
        Returns:
            (x, bool): (x, True) when updated, else (x, False)
        """
        if x < y:
            x = y
            return (x, True)
        else:
            return (x, False)

    from fractions import gcd 
    def gcds(numbers):
        return reduce(gcd, numbers)
    def lcm(x, y):
        return (x * y) // gcd(x, y)
    def lcms(numbers):
        return reduce(lcm, numbers, 1)
    def make_divisors(n, reversed=False):
        """create list of divisors
        
        Args:
            number (int): number from which list of divisors is created
            reversed (bool, optional): ascending order if False. Defaults to False.
        
        Returns:
            list: list of divisors
        """
        divisors = set()
        for i in range(1, int(n**0.5)+1):
            if n % i == 0:
                divisors.add(i)
                divisors.add(n//i)
        return sorted(list(divisors),reverse=reversed)
    
    
    
    INF = 10 ** 18
    MOD = 10 ** 9 + 7
    AtoZ = list('abcdefghijklmnopqrsruvwxyz')
    modpow = lambda a, n, p = MOD: pow(a, n, p) 
    def modinv(a, p = MOD):
        
        
        return modpow(a, p-2, p)
    def modinv_list(n, p = MOD):
        if n <= 1:
            return [0,1][:n+1]
        else:
            inv_t = [0,1]
            for i in range(2, n+1):
                inv_t += [inv_t[p % i] * (p - int(p / i)) % p]
            return inv_t
    def modfactorial_list(n, p = MOD):
        if n == 0:
            return [1]
        else:
            l = [0] * (n+1)
            tmp = 1
            for i in range(1, n+1):
                tmp = tmp * i % p
                l[i] = tmp
            return l
    def modcomb(n, k, fac_list = [], p = MOD):
        
        
        from math import factorial
        if n < 0 or k < 0 or n < k: return 0
        if n == 0 or k == 0: return 1
        if len(fac_list) <= n:
            a = factorial(n) % p
            b = factorial(k) % p
            c = factorial(n-k) % p
        else:
            a = fac_list[n]
            b = fac_list[k]
            c = fac_list[n-k]
        return (a * modpow(b, p-2, p) * modpow(c, p-2, p)) % p
    def modadd(a, b, p = MOD):
        return (a + b) % MOD
    def modsub(a, b, p = MOD):
        return (a - b) % p
    def modmul(a, b, p = MOD):
        return ((a % p) * (b % p)) % p
    def moddiv(a, b, p = MOD):
        return modmul(a, modpow(b, p-2, p))

    class UnionFindTree:
        """union find tree class
        TODO: fix this description...
        how to use (example):
        >>  uf = UnionFindTree(N) 
        >>  if uf.find_root(a) == uf.find_root(b):
        >>      do something
        >>  else:
        >>      do something
        >>      uf.unite(a, b)
        """
        def __init__(self, N):
            self.root = [-1] * (N+1)
            self.rank   = [0]  * (N+1)
            self.connected_num = [1] * (N+1)
    
        def find_root(self,x):
            root = self.root
            while root[x] != -1:
                x = root[x]
            return x
    
        def unite(self,x,y):
            root = self.root
            rank = self.rank
            connected_num = self.connected_num
            find_root = self.find_root
    
            rx = find_root(x)
            ry = find_root(y)
            if rx != ry:
                if rank[rx] < rank[ry]:
                    root[rx] = ry
                    rx,ry = ry,rx
                else:
                    if rank[rx] == rank[ry]:
                        rank[rx] += 1
                    root[ry] = rx       
                connected_num[rx] += connected_num[ry]

    
    
    
    
    

    def BellmanFord(N, M, ABC, vertex_start, vertex_end, value_if_inf = -1, find_shortest = False):
        """to calculate furthest or shortest length between vertex_start and vertex_end using BellmanFord algorithm
        
        Args:
            N (int): number of vertices
            M (int): number of edges
            ABC (list): [(ai, bi, ci) for _ in range(N)] where i-th edge is directed from vertex ai to vertex bi and the length is ci 
            vertex_start (int): start vertex. usually use 0.
            vertex_end (int): end vertex. usually use N-1.
            value_if_inf (int or string as you like, optional): value you want when the furthest (or shortest) distance is infinite (or -infinite). Defaults to -1.
            find_shortest (bool, optional): choose False to find furthest path. Defaults to False.
        
        Returns:
            int or string: normally int (but can be str if you set value_if_inf to str)
            
        Example:
                N, M, P = R()
                ABC = [R() for _ in range(M)]
                ABC = [(a-1, b-1, c-P) for a, b, c in ABC]
                print(BellmanFord(N, M, ABC, 0, N-1, value_if_inf = 'inf'))

        """

        def make_reachable_list(N, M, ABC, vertex_start, vertex_end):
            reachable_to_direct = defaultdict(list)
            reachable_from_direct = defaultdict(list)
            reachable_from_start = [False] * N
            reachable_to_end = [False] * N
            reachable_from_start[vertex_start] = True
            reachable_to_end[vertex_end] = True
            reachable_from_both_sides = [False] * N
            dfs_from_start = []
            dfs_to_end = []
            for a, b, c in ABC:
                reachable_to_direct[a].append(b)
                reachable_from_direct[b].append(a)
                if a == vertex_start:
                    dfs_from_start.append(b)
                    reachable_from_start[b] = True
                if b == vertex_end:
                    dfs_to_end.append(a)
                    reachable_to_end[a] = True
            while dfs_from_start:
                v = dfs_from_start.pop()
                for i in reachable_to_direct[v]:
                    if not reachable_from_start[i]:
                        reachable_from_start[i] = True
                        dfs_from_start.append(i)
            while dfs_to_end:
                v = dfs_to_end.pop()
                for i in reachable_from_direct[v]:
                    if not reachable_to_end[i]:
                        reachable_to_end[i] = True
                        dfs_to_end.append(i)
            for i in range(N):
                reachable_from_both_sides[i] = reachable_from_start[i] and reachable_to_end[i]
            return reachable_from_both_sides
        
        reachable_from_both_sides = make_reachable_list(N, M, ABC, vertex_start, vertex_end)
        
        if find_shortest:
            dist = [INF for i in range(N)]
        else:
            dist = [-INF for i in range(N)]
        
        dist[vertex_start] = 0
        for i in range(N):
            updated = False
            for a, b, c in ABC:
                if not reachable_from_both_sides[a]:
                    continue
                elif find_shortest:
                    update_condition = dist[a] + c < dist[b]
                else:
                    update_condition = dist[a] + c > dist[b]
                if dist[a] != INF and update_condition:
                    dist[b] = dist[a] + c
                    updated = True
                    if i == N-1:
                        return value_if_inf
            if not updated:
                break
        return dist[vertex_end]

    """ initialize variables and set inputs
    
        
        
            
            
    
        
        
        
        
        
        
        
    
        
        
        
        
    
        
        
    """

    
    r = lambda: sys.stdin.readline().strip()
    r_int = lambda: int(r())
    r_float = lambda: float(r())
    R = lambda: list(map(int, r().split()))
    R_str = lambda: r().split()
    R_map = lambda: map(int, r().split())
    R_float = lambda: list(map(float, r().split()))
    R_tuple = lambda: tuple(map(int, r().split()))

    """ how to treat input
    
    
    
    
    
    
    
    """

    
    if sample_file:
        sys.stdin = open(sample_file)
        
    
    
    
    S = r()
    if S == 'ABC':
        print('ARC')
    else:
        print('ABC')

    
    
    

    """memo: how to use defaultdict of list
    
    Dic = defaultdict(list)
    
    Dic[x].append(y)
    
    for k, v in Dic.items():
    """
    
    """memo: how to solve binary problems
    
    >>> a = 5
    >>> bin_str_a = format(a, '
    >>> print(bin_str_a)
    0b0101 
    """
    
    """memo: how to solve the problem
    creating simple test/answer
    greed
    simple dp
    graph
    """

if __name__ == '__main__':
    main()

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

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

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

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:
    pass

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

Solution (Python):
from sys import stdin
import re
import bisect

line = stdin.readline().rstrip()
if line == '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")
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):
v = input()
if v == "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):

MOD = 10 ** 9 + 7
INFI = 10**10

import math

import itertools
import heapq


import copy
from functools import lru_cache

def sosuhante(n):
    for k in range(2, int(math.sqrt(n))+1):
        if n% k ==0:
            return False
    return True
def cmb(n, r):
    if n - r < r: r = n - r
    if r == 0: return 1
    if r == 1: return n

    numerator = [n - r + k + 1 for k in range(r)]
    denominator = [k + 1 for k in range(r)]

    for p in range(2,r+1):
        pivot = denominator[p - 1]
        if pivot > 1:
            offset = (n - r) % p
            for k in range(p-1,r,p):
                numerator[k - offset] /= pivot
                denominator[k] /= pivot

    result = 1
    for k in range(r):
        if numerator[k] > 1:
            result *= int(numerator[k])

    return result

def kingaku(a,b,n):
    keta=len(str(n))
    return a*n+b*keta

def my_index(l, x, default=False):
    if x in l:
        return l.index(x)
    else:
        return default




def ret(a):
    c=[None]*(len(a)-1)
    if len(a)==1:
        return a[0]
    elif len(a)==0:
        return 0
    for i in range(1,len(a)):
        c[i-1]=abs(a[i]-a[i-1])
    return ret(c)


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





if __name__ == "__main__":

    main()

Solution (Python):
def q1():
    s = input()
    if s == "ABC":
        print("ARC")
    else:
        print("ABC")

q1()

Solution (Python):
import numpy as np
import math
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):
a = input()
if a == "ABC":
  print("ARC")
else:
  print("ABC")

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

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

if __name__ == '__main__':
    resolve()

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):

import sys
import math


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

Solution (Python):
import sys
int1 = lambda x: int(x) - 1
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines
sys.setrecursionlimit(500000)

S = read().decode().rstrip()

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

Solution (Python):
N = input()


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

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

Solution (Python):
import math






N = input()









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

Solution (Python):
from sys import stdin

S = input()

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

Solution (Python):

import sys


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

def main():
    def iterate_tokens():
        for line in sys.stdin:
            for word in line.split():
                yield word
    tokens = iterate_tokens()
    S = next(tokens)  
    solve(S)

if __name__ == '__main__':
    main()

Solution (Python):
S = input()

ans=""

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

print(ans)

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

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")
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):
x = input()

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

Solution (Python):



import sys


def input():
    return sys.stdin.readline()


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

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


if __name__ == "__main__":
    resolve()

Solution (Python):
a =input()

if a == '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):
a=input()

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

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

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