import java.util.*;

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

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

        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);

        String S = sc.next();
        if (S.equals("ABC"))
            System.out.println("ARC");
        else
            System.out.println("ABC");
    } main {
        Scanner sc = new Scanner(System.in);

        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) 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.*;

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

        String S = sc.next();
        if (S.equals("ABC"))
            System.out.println("ARC");
        else
            System.out.println("ABC");
    }
}
