import java.util.*;
import java.io.*;
public class Main{

     public static void main(String []args) throws IOException{
       
       BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
       
       String a = br.readLine();
       
       if(a.compareTo("ABC") == 0)
       System.out.println("ARC");
       else System.out.println("ABC");
     }
} import java.util.*; util.* java import java.io.*; io.* java public class Main{

     public static void main(String []args) throws IOException{
       
       BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
       
       String a = br.readLine();
       
       if(a.compareTo("ABC") == 0)
       System.out.println("ARC");
       else System.out.println("ABC");
     }
} Main public static void main(String []args) throws IOException{
       
       BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
       
       String a = br.readLine();
       
       if(a.compareTo("ABC") == 0)
       System.out.println("ARC");
       else System.out.println("ABC");
     } main {
       
       BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
       
       String a = br.readLine();
       
       if(a.compareTo("ABC") == 0)
       System.out.println("ARC");
       else System.out.println("ABC");
     } BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) String a = br.readLine(); a br.readLine() br.readLine br if(a.compareTo("ABC") == 0)
       System.out.println("ARC");
       else System.out.println("ABC"); a.compareTo("ABC") == 0 a.compareTo("ABC") a.compareTo a "ABC" 0 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) throws IOException{
       
       BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
       
       String a = br.readLine();
       
       if(a.compareTo("ABC") == 0)
       System.out.println("ARC");
       else System.out.println("ABC");
     }
} public class Main{

     public static void main(String []args) throws IOException{
       
       BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
       
       String a = br.readLine();
       
       if(a.compareTo("ABC") == 0)
       System.out.println("ARC");
       else System.out.println("ABC");
     }
} Main
import java.util.*;
import java.io.*;
public class Main{

     public static void main(String []args) throws IOException{
       
       BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
       
       String a = br.readLine();
       
       if(a.compareTo("ABC") == 0)
       System.out.println("ARC");
       else System.out.println("ABC");
     }
}