import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        if(s.substring(1,2).equals("R"))
            System.out.println("ABC");
        else
            System.out.println("ARC");

    }
} import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        if(s.substring(1,2).equals("R"))
            System.out.println("ABC");
        else
            System.out.println("ARC");

    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        if(s.substring(1,2).equals("R"))
            System.out.println("ABC");
        else
            System.out.println("ARC");

    } main {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        if(s.substring(1,2).equals("R"))
            System.out.println("ABC");
        else
            System.out.println("ARC");

    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String s = sc.next(); s sc.next() sc.next sc if(s.substring(1,2).equals("R"))
            System.out.println("ABC");
        else
            System.out.println("ARC"); s.substring(1,2).equals("R") s.substring(1,2).equals s.substring(1,2) s.substring s 1 2 "R" System.out.println("ABC") System.out.println System.out System System.out "ABC" System.out.println("ARC") System.out.println System.out System System.out "ARC" String[] args args public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        if(s.substring(1,2).equals("R"))
            System.out.println("ABC");
        else
            System.out.println("ARC");

    }
} public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        if(s.substring(1,2).equals("R"))
            System.out.println("ABC");
        else
            System.out.println("ARC");

    }
} Main
import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        if(s.substring(1,2).equals("R"))
            System.out.println("ABC");
        else
            System.out.println("ARC");

    }
}
