
import java.util.*;

public class Main {
    static Scanner scanner;
    public static void main(String[] args) {
        scanner = new Scanner(System.in);
        new ABC166A().main();
    }
    static class ABC166A {
        public void main()
        {
            System.out.println(scanner.next().equals("ABC")?"ARC":"ABC");
        }
    }
} import java.util.*; util.* java public class Main {
    static Scanner scanner;
    public static void main(String[] args) {
        scanner = new Scanner(System.in);
        new ABC166A().main();
    }
    static class ABC166A {
        public void main()
        {
            System.out.println(scanner.next().equals("ABC")?"ARC":"ABC");
        }
    }
} Main static Scanner scanner; scanner public static void main(String[] args) {
        scanner = new Scanner(System.in);
        new ABC166A().main();
    } main {
        scanner = new Scanner(System.in);
        new ABC166A().main();
    } scanner = new Scanner(System.in) scanner new Scanner(System.in) new ABC166A().main() new ABC166A().main new ABC166A() String[] args args static class ABC166A {
        public void main()
        {
            System.out.println(scanner.next().equals("ABC")?"ARC":"ABC");
        }
    } ABC166A public void main()
        {
            System.out.println(scanner.next().equals("ABC")?"ARC":"ABC");
        } main {
            System.out.println(scanner.next().equals("ABC")?"ARC":"ABC");
        } System.out.println(scanner.next().equals("ABC")?"ARC":"ABC") System.out.println System.out System System.out scanner.next().equals("ABC")?"ARC":"ABC" scanner.next().equals("ABC") scanner.next().equals scanner.next() scanner.next scanner "ABC" "ARC" "ABC" public class Main {
    static Scanner scanner;
    public static void main(String[] args) {
        scanner = new Scanner(System.in);
        new ABC166A().main();
    }
    static class ABC166A {
        public void main()
        {
            System.out.println(scanner.next().equals("ABC")?"ARC":"ABC");
        }
    }
} public class Main {
    static Scanner scanner;
    public static void main(String[] args) {
        scanner = new Scanner(System.in);
        new ABC166A().main();
    }
    static class ABC166A {
        public void main()
        {
            System.out.println(scanner.next().equals("ABC")?"ARC":"ABC");
        }
    }
} Main

import java.util.*;

public class Main {
    static Scanner scanner;
    public static void main(String[] args) {
        scanner = new Scanner(System.in);
        new ABC166A().main();
    }
    static class ABC166A {
        public void main()
        {
            System.out.println(scanner.next().equals("ABC")?"ARC":"ABC");
        }
    }
}