import java.lang.reflect.Array;
import java.util.*;
import java.io.*;
import java.lang.*;

public class Main {
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);

        String a = sc.next();
        
        if (a.equals("ABC"))
            System.out.println("ARC");
        else
            System.out.println("ABC");

    }
} import java.lang.reflect.Array; Array java.lang.reflect import java.util.*; util.* java import java.io.*; io.* java import java.lang.*; lang.* java public class Main {
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);

        String a = sc.next();
        
        if (a.equals("ABC"))
            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();
        
        if (a.equals("ABC"))
            System.out.println("ARC");
        else
            System.out.println("ABC");

    } main {
        Scanner sc = new Scanner(System.in);

        String a = sc.next();
        
        if (a.equals("ABC"))
            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 if (a.equals("ABC"))
            System.out.println("ARC");
        else
            System.out.println("ABC"); a.equals("ABC") a.equals a "ABC" System.out.println("ARC") System.out.println System.out System System.out "ARC" 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();
        
        if (a.equals("ABC"))
            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();
        
        if (a.equals("ABC"))
            System.out.println("ARC");
        else
            System.out.println("ABC");

    }
} Main
import java.lang.reflect.Array;
import java.util.*;
import java.io.*;
import java.lang.*;

public class Main {
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);

        String a = sc.next();
        
        if (a.equals("ABC"))
            System.out.println("ARC");
        else
            System.out.println("ABC");

    }
}
