import java.util.ArrayList;
import java.util.Scanner;
 class Main
{
	public static void main (String[] args)
	 {
		Scanner sc=new Scanner(System.in); 
		int t,i;
		String s=sc.next();
		if(s.equals("ABC"))
			System.out.println("ARC");
		else
			System.out.println("ABC");
			
	}
} import java.util.ArrayList; ArrayList java.util import java.util.Scanner; Scanner java.util class Main
{
	public static void main (String[] args)
	 {
		Scanner sc=new Scanner(System.in); 
		int t,i;
		String s=sc.next();
		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); 
		int t,i;
		String s=sc.next();
		if(s.equals("ABC"))
			System.out.println("ARC");
		else
			System.out.println("ABC");
			
	} main {
		Scanner sc=new Scanner(System.in); 
		int t,i;
		String s=sc.next();
		if(s.equals("ABC"))
			System.out.println("ARC");
		else
			System.out.println("ABC");
			
	} Scanner sc=new Scanner(System.in); sc new Scanner(System.in) int t t i; i String s=sc.next(); s sc.next() sc.next 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 System.out System System.out "ARC" System.out.println("ABC") System.out.println System.out System System.out "ABC" String[] args args
import java.util.ArrayList;
import java.util.Scanner;
 class Main
{
	public static void main (String[] args)
	 {
		Scanner sc=new Scanner(System.in); 
		int t,i;
		String s=sc.next();
		if(s.equals("ABC"))
			System.out.println("ARC");
		else
			System.out.println("ABC");
			
	}
}