
import java.util.*;

public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);

		String prev = sc.next();

		if(prev.equals("ABC")){
			System.out.println("ARC");
		}else{
			System.out.println("ABC");
		}

		return;
	}
} import java.util.*; util.* java public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);

		String prev = sc.next();

		if(prev.equals("ABC")){
			System.out.println("ARC");
		}else{
			System.out.println("ABC");
		}

		return;
	}
} Main public static void main(String[] args){
		Scanner sc = new Scanner(System.in);

		String prev = sc.next();

		if(prev.equals("ABC")){
			System.out.println("ARC");
		}else{
			System.out.println("ABC");
		}

		return;
	} main {
		Scanner sc = new Scanner(System.in);

		String prev = sc.next();

		if(prev.equals("ABC")){
			System.out.println("ARC");
		}else{
			System.out.println("ABC");
		}

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

		String prev = sc.next();

		if(prev.equals("ABC")){
			System.out.println("ARC");
		}else{
			System.out.println("ABC");
		}

		return;
	}
} public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);

		String prev = sc.next();

		if(prev.equals("ABC")){
			System.out.println("ARC");
		}else{
			System.out.println("ABC");
		}

		return;
	}
} Main

import java.util.*;

public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);

		String prev = sc.next();

		if(prev.equals("ABC")){
			System.out.println("ARC");
		}else{
			System.out.println("ABC");
		}

		return;
	}
}
