import java.util.*;

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

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