import java.io.PrintWriter;
import java.util.Arrays;
import java.util.Map;
import java.util.Scanner;
import java.util.TreeMap;

public class Main {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        PrintWriter printWriter = new PrintWriter(System.out);
        if (scanner.nextLine().equals("ABC")) {
            printWriter.println("ARC");
        }else {
            printWriter.println("ABC");
        }
        printWriter.flush();
    }
} import java.io.PrintWriter; PrintWriter java.io import java.util.Arrays; Arrays java.util import java.util.Map; Map java.util import java.util.Scanner; Scanner java.util import java.util.TreeMap; TreeMap java.util public class Main {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        PrintWriter printWriter = new PrintWriter(System.out);
        if (scanner.nextLine().equals("ABC")) {
            printWriter.println("ARC");
        }else {
            printWriter.println("ABC");
        }
        printWriter.flush();
    }
} Main public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        PrintWriter printWriter = new PrintWriter(System.out);
        if (scanner.nextLine().equals("ABC")) {
            printWriter.println("ARC");
        }else {
            printWriter.println("ABC");
        }
        printWriter.flush();
    } main {
        Scanner scanner = new Scanner(System.in);
        PrintWriter printWriter = new PrintWriter(System.out);
        if (scanner.nextLine().equals("ABC")) {
            printWriter.println("ARC");
        }else {
            printWriter.println("ABC");
        }
        printWriter.flush();
    } Scanner scanner = new Scanner(System.in); scanner new Scanner(System.in) PrintWriter printWriter = new PrintWriter(System.out); printWriter new PrintWriter(System.out) if (scanner.nextLine().equals("ABC")) {
            printWriter.println("ARC");
        }else {
            printWriter.println("ABC");
        } scanner.nextLine().equals("ABC") scanner.nextLine().equals scanner.nextLine() scanner.nextLine scanner "ABC" {
            printWriter.println("ARC");
        } printWriter.println("ARC") printWriter.println printWriter "ARC" {
            printWriter.println("ABC");
        } printWriter.println("ABC") printWriter.println printWriter "ABC" printWriter.flush() printWriter.flush printWriter String[] args args public class Main {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        PrintWriter printWriter = new PrintWriter(System.out);
        if (scanner.nextLine().equals("ABC")) {
            printWriter.println("ARC");
        }else {
            printWriter.println("ABC");
        }
        printWriter.flush();
    }
} public class Main {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        PrintWriter printWriter = new PrintWriter(System.out);
        if (scanner.nextLine().equals("ABC")) {
            printWriter.println("ARC");
        }else {
            printWriter.println("ABC");
        }
        printWriter.flush();
    }
} Main
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.Map;
import java.util.Scanner;
import java.util.TreeMap;

public class Main {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        PrintWriter printWriter = new PrintWriter(System.out);
        if (scanner.nextLine().equals("ABC")) {
            printWriter.println("ARC");
        }else {
            printWriter.println("ABC");
        }
        printWriter.flush();
    }
}
