import java.util.*;
import java.util.Arrays;
public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        String a = sc.next();
        String x= "ABC";
        String y = "ARC";
        if(a.equals(x)){
            System.out.println("ARC");
        }
        else{
            System.out.println("ABC");

        }

    

    }
   
    
       
    
} import java.util.*; util.* java import java.util.Arrays; Arrays java.util public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        String a = sc.next();
        String x= "ABC";
        String y = "ARC";
        if(a.equals(x)){
            System.out.println("ARC");
        }
        else{
            System.out.println("ABC");

        }

    

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

        }

    

    } main {
        Scanner sc = new Scanner(System.in);
        String a = sc.next();
        String x= "ABC";
        String y = "ARC";
        if(a.equals(x)){
            System.out.println("ARC");
        }
        else{
            System.out.println("ABC");

        }

    

    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String a = sc.next(); a sc.next() sc.next sc String x= "ABC"; x "ABC" String y = "ARC"; y "ARC" if(a.equals(x)){
            System.out.println("ARC");
        }
        else{
            System.out.println("ABC");

        } a.equals(x) a.equals a x {
            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 sc = new Scanner(System.in);
        String a = sc.next();
        String x= "ABC";
        String y = "ARC";
        if(a.equals(x)){
            System.out.println("ARC");
        }
        else{
            System.out.println("ABC");

        }

    

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

        }

    

    }
   
    
       
    
} Main
import java.util.*;
import java.util.Arrays;
public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        String a = sc.next();
        String x= "ABC";
        String y = "ARC";
        if(a.equals(x)){
            System.out.println("ARC");
        }
        else{
            System.out.println("ABC");

        }

    

    }
   
    
       
    
}