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