import java.util.Scanner;
import java.util.Arrays;
import java.util.List;

public class Main {
	public static void main(String[] args) {
	    Scanner sc = new Scanner(System.in);
	    String input = sc.nextLine();
		String result = input.equals("ABC") ? "ARC" : "ABC";
	    System.out.println(result);
	}
} import java.util.Scanner; Scanner java.util import java.util.Arrays; Arrays java.util import java.util.List; List java.util public class Main {
	public static void main(String[] args) {
	    Scanner sc = new Scanner(System.in);
	    String input = sc.nextLine();
		String result = input.equals("ABC") ? "ARC" : "ABC";
	    System.out.println(result);
	}
} Main public static void main(String[] args) {
	    Scanner sc = new Scanner(System.in);
	    String input = sc.nextLine();
		String result = input.equals("ABC") ? "ARC" : "ABC";
	    System.out.println(result);
	} main {
	    Scanner sc = new Scanner(System.in);
	    String input = sc.nextLine();
		String result = input.equals("ABC") ? "ARC" : "ABC";
	    System.out.println(result);
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String input = sc.nextLine(); input sc.nextLine() sc.nextLine sc String result = input.equals("ABC") ? "ARC" : "ABC"; result input.equals("ABC") ? "ARC" : "ABC" input.equals("ABC") input.equals input "ABC" "ARC" "ABC" System.out.println(result) System.out.println System.out System System.out result String[] args args public class Main {
	public static void main(String[] args) {
	    Scanner sc = new Scanner(System.in);
	    String input = sc.nextLine();
		String result = input.equals("ABC") ? "ARC" : "ABC";
	    System.out.println(result);
	}
} public class Main {
	public static void main(String[] args) {
	    Scanner sc = new Scanner(System.in);
	    String input = sc.nextLine();
		String result = input.equals("ABC") ? "ARC" : "ABC";
	    System.out.println(result);
	}
} Main
import java.util.Scanner;
import java.util.Arrays;
import java.util.List;

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