import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;

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");
            }




    }


} import java.util.HashMap; HashMap java.util import java.util.Map; Map java.util import java.util.Scanner; Scanner java.util 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");
            }




    }


} 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");
            }




    } main {
        Scanner sc = new Scanner(System.in);
            String s=sc.next();
            if(s.equals("ABC"))
            {
                System.out.println("ARC");
            }else
            {
                System.out.println("ABC");
            }




    } 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" String args[] args
import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;

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");
            }




    }


}