import java.util.Scanner;
public class Main{
  public static void main(String args[]){
      Scanner l = new Scanner(System.in);
      String s = l.next();
      
      if(s.toLowerCase().equals("arc")){
         System.out.println("ABC");
        }
      else if(s.toLowerCase().equals("abc")){
          System.out.println("ARC");
        }
        else{
         System.out.println("ARC");   
        }
}
} import java.util.Scanner; Scanner java.util public class Main{
  public static void main(String args[]){
      Scanner l = new Scanner(System.in);
      String s = l.next();
      
      if(s.toLowerCase().equals("arc")){
         System.out.println("ABC");
        }
      else if(s.toLowerCase().equals("abc")){
          System.out.println("ARC");
        }
        else{
         System.out.println("ARC");   
        }
}
} Main public static void main(String args[]){
      Scanner l = new Scanner(System.in);
      String s = l.next();
      
      if(s.toLowerCase().equals("arc")){
         System.out.println("ABC");
        }
      else if(s.toLowerCase().equals("abc")){
          System.out.println("ARC");
        }
        else{
         System.out.println("ARC");   
        }
} main {
      Scanner l = new Scanner(System.in);
      String s = l.next();
      
      if(s.toLowerCase().equals("arc")){
         System.out.println("ABC");
        }
      else if(s.toLowerCase().equals("abc")){
          System.out.println("ARC");
        }
        else{
         System.out.println("ARC");   
        }
} Scanner l = new Scanner(System.in); l new Scanner(System.in) String s = l.next(); s l.next() l.next l if(s.toLowerCase().equals("arc")){
         System.out.println("ABC");
        }
      else if(s.toLowerCase().equals("abc")){
          System.out.println("ARC");
        }
        else{
         System.out.println("ARC");   
        } s.toLowerCase().equals("arc") s.toLowerCase().equals s.toLowerCase() s.toLowerCase s "arc" {
         System.out.println("ABC");
        } System.out.println("ABC") System.out.println System.out System System.out "ABC" if(s.toLowerCase().equals("abc")){
          System.out.println("ARC");
        }
        else{
         System.out.println("ARC");   
        } s.toLowerCase().equals("abc") s.toLowerCase().equals s.toLowerCase() s.toLowerCase s "abc" {
          System.out.println("ARC");
        } System.out.println("ARC") System.out.println System.out System System.out "ARC" {
         System.out.println("ARC");   
        } System.out.println("ARC") System.out.println System.out System System.out "ARC" String args[] args public class Main{
  public static void main(String args[]){
      Scanner l = new Scanner(System.in);
      String s = l.next();
      
      if(s.toLowerCase().equals("arc")){
         System.out.println("ABC");
        }
      else if(s.toLowerCase().equals("abc")){
          System.out.println("ARC");
        }
        else{
         System.out.println("ARC");   
        }
}
} public class Main{
  public static void main(String args[]){
      Scanner l = new Scanner(System.in);
      String s = l.next();
      
      if(s.toLowerCase().equals("arc")){
         System.out.println("ABC");
        }
      else if(s.toLowerCase().equals("abc")){
          System.out.println("ARC");
        }
        else{
         System.out.println("ARC");   
        }
}
} Main
import java.util.Scanner;
public class Main{
  public static void main(String args[]){
      Scanner l = new Scanner(System.in);
      String s = l.next();
      
      if(s.toLowerCase().equals("arc")){
         System.out.println("ABC");
        }
      else if(s.toLowerCase().equals("abc")){
          System.out.println("ARC");
        }
        else{
         System.out.println("ARC");   
        }
}
}