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