import java.util.Scanner;

public class Main {
    public static void main(String[] args) throws Exception {

//    	File file = new File("test.txt");
//    	Scanner sc = new Scanner(file);
        Scanner sc = new Scanner(System.in);
        String S = sc.next();
        sc.close();
        System.out.println(S.equals("ABC") ? "ARC" : "ABC");
    }
} import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String[] args) throws Exception {

//    	File file = new File("test.txt");
//    	Scanner sc = new Scanner(file);
        Scanner sc = new Scanner(System.in);
        String S = sc.next();
        sc.close();
        System.out.println(S.equals("ABC") ? "ARC" : "ABC");
    }
} Main public static void main(String[] args) throws Exception {

//    	File file = new File("test.txt");
//    	Scanner sc = new Scanner(file);
        Scanner sc = new Scanner(System.in);
        String S = sc.next();
        sc.close();
        System.out.println(S.equals("ABC") ? "ARC" : "ABC");
    } main {

//    	File file = new File("test.txt");
//    	Scanner sc = new Scanner(file);
        Scanner sc = new Scanner(System.in);
        String S = sc.next();
        sc.close();
        System.out.println(S.equals("ABC") ? "ARC" : "ABC");
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String S = sc.next(); S sc.next() sc.next sc sc.close() sc.close sc System.out.println(S.equals("ABC") ? "ARC" : "ABC") System.out.println System.out System System.out S.equals("ABC") ? "ARC" : "ABC" S.equals("ABC") S.equals S "ABC" "ARC" "ABC" String[] args args public class Main {
    public static void main(String[] args) throws Exception {

//    	File file = new File("test.txt");
//    	Scanner sc = new Scanner(file);
        Scanner sc = new Scanner(System.in);
        String S = sc.next();
        sc.close();
        System.out.println(S.equals("ABC") ? "ARC" : "ABC");
    }
} public class Main {
    public static void main(String[] args) throws Exception {

//    	File file = new File("test.txt");
//    	Scanner sc = new Scanner(file);
        Scanner sc = new Scanner(System.in);
        String S = sc.next();
        sc.close();
        System.out.println(S.equals("ABC") ? "ARC" : "ABC");
    }
} Main
import java.util.Scanner;

public class Main {
    public static void main(String[] args) throws Exception {

//    	File file = new File("test.txt");
//    	Scanner sc = new Scanner(file);
        Scanner sc = new Scanner(System.in);
        String S = sc.next();
        sc.close();
        System.out.println(S.equals("ABC") ? "ARC" : "ABC");
    }
}