import java.util.*;

class Main {
    private static Scanner sc;

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





 import java.util.*; util.* java class Main {
    private static Scanner sc;

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

class Main {
    private static Scanner sc;

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






