import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;

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

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