import java.util.*;
import java.io.*;
 
public class Main{
 
	public static void main(String[] $){
		Scanner s = new Scanner(System.in);
        String S = s.next();
        String A = "ABC";
        
        if(S.equals(A)){
            System.out.println("ARC");
        }else{
            System.out.println("ABC");
        }
        
	}
}  import java.util.*; util.* java import java.io.*; io.* java public class Main{
 
	public static void main(String[] $){
		Scanner s = new Scanner(System.in);
        String S = s.next();
        String A = "ABC";
        
        if(S.equals(A)){
            System.out.println("ARC");
        }else{
            System.out.println("ABC");
        }
        
	}
} Main public static void main(String[] $){
		Scanner s = new Scanner(System.in);
        String S = s.next();
        String A = "ABC";
        
        if(S.equals(A)){
            System.out.println("ARC");
        }else{
            System.out.println("ABC");
        }
        
	} main {
		Scanner s = new Scanner(System.in);
        String S = s.next();
        String A = "ABC";
        
        if(S.equals(A)){
            System.out.println("ARC");
        }else{
            System.out.println("ABC");
        }
        
	} Scanner s = new Scanner(System.in); s new Scanner(System.in) String S = s.next(); S s.next() s.next s String A = "ABC"; A "ABC" if(S.equals(A)){
            System.out.println("ARC");
        }else{
            System.out.println("ABC");
        } S.equals(A) S.equals S A {
            System.out.println("ARC");
        } System.out.println("ARC") System.out.println System.out System System.out "ARC" {
            System.out.println("ABC");
        } System.out.println("ABC") System.out.println System.out System System.out "ABC" String[] $ $ public class Main{
 
	public static void main(String[] $){
		Scanner s = new Scanner(System.in);
        String S = s.next();
        String A = "ABC";
        
        if(S.equals(A)){
            System.out.println("ARC");
        }else{
            System.out.println("ABC");
        }
        
	}
} public class Main{
 
	public static void main(String[] $){
		Scanner s = new Scanner(System.in);
        String S = s.next();
        String A = "ABC";
        
        if(S.equals(A)){
            System.out.println("ARC");
        }else{
            System.out.println("ABC");
        }
        
	}
} Main
import java.util.*;
import java.io.*;
 
public class Main{
 
	public static void main(String[] $){
		Scanner s = new Scanner(System.in);
        String S = s.next();
        String A = "ABC";
        
        if(S.equals(A)){
            System.out.println("ARC");
        }else{
            System.out.println("ABC");
        }
        
	}
} 