import java.util.*;

class Main {
    public static void main(String args[]) {
        Scanner inp = new Scanner(System.in);
        String s = inp.nextLine();
        String ans = (s.equals("ABC") ? "ARC" : "ABC");
        System.out.println(ans);
    }
} import java.util.*; util.* java class Main {
    public static void main(String args[]) {
        Scanner inp = new Scanner(System.in);
        String s = inp.nextLine();
        String ans = (s.equals("ABC") ? "ARC" : "ABC");
        System.out.println(ans);
    }
} Main public static void main(String args[]) {
        Scanner inp = new Scanner(System.in);
        String s = inp.nextLine();
        String ans = (s.equals("ABC") ? "ARC" : "ABC");
        System.out.println(ans);
    } main {
        Scanner inp = new Scanner(System.in);
        String s = inp.nextLine();
        String ans = (s.equals("ABC") ? "ARC" : "ABC");
        System.out.println(ans);
    } Scanner inp = new Scanner(System.in); inp new Scanner(System.in) String s = inp.nextLine(); s inp.nextLine() inp.nextLine inp String ans = (s.equals("ABC") ? "ARC" : "ABC"); ans (s.equals("ABC") ? "ARC" : "ABC") s.equals("ABC") s.equals s "ABC" "ARC" "ABC" System.out.println(ans) System.out.println System.out System System.out ans String args[] args
import java.util.*;

class Main {
    public static void main(String args[]) {
        Scanner inp = new Scanner(System.in);
        String s = inp.nextLine();
        String ans = (s.equals("ABC") ? "ARC" : "ABC");
        System.out.println(ans);
    }
}