import java.util.Scanner;

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

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

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

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

} Main
import java.util.Scanner;

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

}
