import java.util.Scanner;

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

        Scanner scan = new Scanner(System.in);
		String S = scan.nextLine();
        
        if(S.equals("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) throws Exception {

        Scanner scan = new Scanner(System.in);
		String S = scan.nextLine();
        
        if(S.equals("ABC")){
            System.out.println("ARC");
        }else{
            System.out.println("ABC");
        }
        
    }
} Main public static void main(String[] args) throws Exception {

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

        Scanner scan = new Scanner(System.in);
		String S = scan.nextLine();
        
        if(S.equals("ABC")){
            System.out.println("ARC");
        }else{
            System.out.println("ABC");
        }
        
    } Scanner scan = new Scanner(System.in); scan new Scanner(System.in) String S = scan.nextLine(); S scan.nextLine() scan.nextLine scan if(S.equals("ABC")){
            System.out.println("ARC");
        }else{
            System.out.println("ABC");
        } S.equals("ABC") S.equals 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) throws Exception {

        Scanner scan = new Scanner(System.in);
		String S = scan.nextLine();
        
        if(S.equals("ABC")){
            System.out.println("ARC");
        }else{
            System.out.println("ABC");
        }
        
    }
} public class Main {
    public static void main(String[] args) throws Exception {

        Scanner scan = new Scanner(System.in);
		String S = scan.nextLine();
        
        if(S.equals("ABC")){
            System.out.println("ARC");
        }else{
            System.out.println("ABC");
        }
        
    }
} Main
import java.util.Scanner;

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

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