import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

		Scanner scan = new Scanner(System.in);

		String S = scan.next();

		if (S.contentEquals("ABC")) {
			System.out.println("ARC");
		} else {
			System.out.println("ABC");
		}

	}

} import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {

		Scanner scan = new Scanner(System.in);

		String S = scan.next();

		if (S.contentEquals("ABC")) {
			System.out.println("ARC");
		} else {
			System.out.println("ABC");
		}

	}

} Main public static void main(String[] args) {

		Scanner scan = new Scanner(System.in);

		String S = scan.next();

		if (S.contentEquals("ABC")) {
			System.out.println("ARC");
		} else {
			System.out.println("ABC");
		}

	} main {

		Scanner scan = new Scanner(System.in);

		String S = scan.next();

		if (S.contentEquals("ABC")) {
			System.out.println("ARC");
		} else {
			System.out.println("ABC");
		}

	} Scanner scan = new Scanner(System.in); scan new Scanner(System.in) String S = scan.next(); S scan.next() scan.next scan if (S.contentEquals("ABC")) {
			System.out.println("ARC");
		} else {
			System.out.println("ABC");
		} S.contentEquals("ABC") S.contentEquals S "ABC" {
			System.out.println("ARC");
		} System.out.println("ARC") System.out.println System.out System System.out "ARC" {
			System.out.println("ABC");
		} 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 scan = new Scanner(System.in);

		String S = scan.next();

		if (S.contentEquals("ABC")) {
			System.out.println("ARC");
		} else {
			System.out.println("ABC");
		}

	}

} public class Main {

	public static void main(String[] args) {

		Scanner scan = new Scanner(System.in);

		String S = scan.next();

		if (S.contentEquals("ABC")) {
			System.out.println("ARC");
		} else {
			System.out.println("ABC");
		}

	}

} Main
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

		Scanner scan = new Scanner(System.in);

		String S = scan.next();

		if (S.contentEquals("ABC")) {
			System.out.println("ARC");
		} else {
			System.out.println("ABC");
		}

	}

}