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