
import java.util.Scanner;


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

import java.util.Scanner;


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