import java.util.Scanner;

public class Main {
    Scanner in = new Scanner(System.in);
    public static void main(String[] args) {
        new Main().solve();
    }

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

    void solve(){
        String s = in.next();
        if(s.equals("ABC"))
            System.out.println("ARC");
        else System.out.println("ABC");
    }
} Main Scanner in = new Scanner(System.in); in new Scanner(System.in) public static void main(String[] args) {
        new Main().solve();
    } main {
        new Main().solve();
    } new Main().solve() new Main().solve new Main() String[] args args void solve(){
        String s = in.next();
        if(s.equals("ABC"))
            System.out.println("ARC");
        else System.out.println("ABC");
    } solve {
        String s = in.next();
        if(s.equals("ABC"))
            System.out.println("ARC");
        else System.out.println("ABC");
    } String s = in.next(); s in.next() in.next in 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" public class Main {
    Scanner in = new Scanner(System.in);
    public static void main(String[] args) {
        new Main().solve();
    }

    void solve(){
        String s = in.next();
        if(s.equals("ABC"))
            System.out.println("ARC");
        else System.out.println("ABC");
    }
} public class Main {
    Scanner in = new Scanner(System.in);
    public static void main(String[] args) {
        new Main().solve();
    }

    void solve(){
        String s = in.next();
        if(s.equals("ABC"))
            System.out.println("ARC");
        else System.out.println("ABC");
    }
} Main
import java.util.Scanner;

public class Main {
    Scanner in = new Scanner(System.in);
    public static void main(String[] args) {
        new Main().solve();
    }

    void solve(){
        String s = in.next();
        if(s.equals("ABC"))
            System.out.println("ARC");
        else System.out.println("ABC");
    }
}
