import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		System.out.println(sc.next().equals("ABC") ? "ARC" : "ABC");
	}
} import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		System.out.println(sc.next().equals("ABC") ? "ARC" : "ABC");
	}
} Main public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		System.out.println(sc.next().equals("ABC") ? "ARC" : "ABC");
	} main {

		Scanner sc = new Scanner(System.in);

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

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		System.out.println(sc.next().equals("ABC") ? "ARC" : "ABC");
	}
} public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		System.out.println(sc.next().equals("ABC") ? "ARC" : "ABC");
	}
} Main
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		System.out.println(sc.next().equals("ABC") ? "ARC" : "ABC");
	}
}