import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

		Scanner scan = new Scanner(System.in);

		String lastWeekContest = scan.next();

		if (lastWeekContest.equals("ABC")) {
			System.out.print("ARC");
		} else {
			System.out.print("ABC");
		}

	}

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

	public static void main(String[] args) {

		Scanner scan = new Scanner(System.in);

		String lastWeekContest = scan.next();

		if (lastWeekContest.equals("ABC")) {
			System.out.print("ARC");
		} else {
			System.out.print("ABC");
		}

	}

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

		Scanner scan = new Scanner(System.in);

		String lastWeekContest = scan.next();

		if (lastWeekContest.equals("ABC")) {
			System.out.print("ARC");
		} else {
			System.out.print("ABC");
		}

	} main {

		Scanner scan = new Scanner(System.in);

		String lastWeekContest = scan.next();

		if (lastWeekContest.equals("ABC")) {
			System.out.print("ARC");
		} else {
			System.out.print("ABC");
		}

	} Scanner scan = new Scanner(System.in); scan new Scanner(System.in) String lastWeekContest = scan.next(); lastWeekContest scan.next() scan.next scan if (lastWeekContest.equals("ABC")) {
			System.out.print("ARC");
		} else {
			System.out.print("ABC");
		} lastWeekContest.equals("ABC") lastWeekContest.equals lastWeekContest "ABC" {
			System.out.print("ARC");
		} System.out.print("ARC") System.out.print System.out System System.out "ARC" {
			System.out.print("ABC");
		} System.out.print("ABC") System.out.print 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 lastWeekContest = scan.next();

		if (lastWeekContest.equals("ABC")) {
			System.out.print("ARC");
		} else {
			System.out.print("ABC");
		}

	}

} public class Main {

	public static void main(String[] args) {

		Scanner scan = new Scanner(System.in);

		String lastWeekContest = scan.next();

		if (lastWeekContest.equals("ABC")) {
			System.out.print("ARC");
		} else {
			System.out.print("ABC");
		}

	}

} Main
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

		Scanner scan = new Scanner(System.in);

		String lastWeekContest = scan.next();

		if (lastWeekContest.equals("ABC")) {
			System.out.print("ARC");
		} else {
			System.out.print("ABC");
		}

	}

}
