import java.util.Scanner;

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

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

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

} Main
import java.util.Scanner;

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

}
