import java.io.*;

/**
 * Created by Ayushi on 03 May 2020.
 * Problem:
 * Round:
 */

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

/**
 * Created by Ayushi on 03 May 2020.
 * Problem:
 * Round:
 */

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