import java.util.*;

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

public class Main{
	public static void main(String[] args){
		Scanner stdIn = new Scanner(System.in);
		String a = stdIn.next();
		
		if(a.equals("ABC")){
			System.out.println("ARC");
		}else{
			System.out.println("ABC");
		}
	
		
	}
}