import java.util.*;
public class Main
{
  public static void main(String args[])
  {
    Scanner in=new Scanner(System.in);
    String s=in.next();
    if(s.compareTo("ABC")==0)
    {
      System.out.println("ARC");
    }
    else
    {
      System.out.println("ABC");
    }
  }
} import java.util.*; util.* java public class Main
{
  public static void main(String args[])
  {
    Scanner in=new Scanner(System.in);
    String s=in.next();
    if(s.compareTo("ABC")==0)
    {
      System.out.println("ARC");
    }
    else
    {
      System.out.println("ABC");
    }
  }
} Main public static void main(String args[])
  {
    Scanner in=new Scanner(System.in);
    String s=in.next();
    if(s.compareTo("ABC")==0)
    {
      System.out.println("ARC");
    }
    else
    {
      System.out.println("ABC");
    }
  } main {
    Scanner in=new Scanner(System.in);
    String s=in.next();
    if(s.compareTo("ABC")==0)
    {
      System.out.println("ARC");
    }
    else
    {
      System.out.println("ABC");
    }
  } Scanner in=new Scanner(System.in); in new Scanner(System.in) String s=in.next(); s in.next() in.next in if(s.compareTo("ABC")==0)
    {
      System.out.println("ARC");
    }
    else
    {
      System.out.println("ABC");
    } s.compareTo("ABC")==0 s.compareTo("ABC") s.compareTo s "ABC" 0 {
      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 in=new Scanner(System.in);
    String s=in.next();
    if(s.compareTo("ABC")==0)
    {
      System.out.println("ARC");
    }
    else
    {
      System.out.println("ABC");
    }
  }
} public class Main
{
  public static void main(String args[])
  {
    Scanner in=new Scanner(System.in);
    String s=in.next();
    if(s.compareTo("ABC")==0)
    {
      System.out.println("ARC");
    }
    else
    {
      System.out.println("ABC");
    }
  }
} Main
import java.util.*;
public class Main
{
  public static void main(String args[])
  {
    Scanner in=new Scanner(System.in);
    String s=in.next();
    if(s.compareTo("ABC")==0)
    {
      System.out.println("ARC");
    }
    else
    {
      System.out.println("ABC");
    }
  }
}