import java.util.*;
 
public class Main {
 
    public static void main(String args[]) {
 
        // 入力
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        sc.close();
 
        // 主処理
        String result;
        switch (s) {
            case "ABC":
                result = "ARC";
                break;
            default:
                result = "ABC";
                break;
        }
 
        // 出力
        System.out.println(result);
    }
} import java.util.*; util.* java public class Main {
 
    public static void main(String args[]) {
 
        // 入力
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        sc.close();
 
        // 主処理
        String result;
        switch (s) {
            case "ABC":
                result = "ARC";
                break;
            default:
                result = "ABC";
                break;
        }
 
        // 出力
        System.out.println(result);
    }
} Main public static void main(String args[]) {
 
        // 入力
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        sc.close();
 
        // 主処理
        String result;
        switch (s) {
            case "ABC":
                result = "ARC";
                break;
            default:
                result = "ABC";
                break;
        }
 
        // 出力
        System.out.println(result);
    } main {
 
        // 入力
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        sc.close();
 
        // 主処理
        String result;
        switch (s) {
            case "ABC":
                result = "ARC";
                break;
            default:
                result = "ABC";
                break;
        }
 
        // 出力
        System.out.println(result);
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String s = sc.next(); s sc.next() sc.next sc sc.close() sc.close sc String result; result switch (s) {
            case "ABC":
                result = "ARC";
                break;
            default:
                result = "ABC";
                break;
        } s case "ABC": "ABC" case "ABC": result = "ARC" result "ARC" break; default: default: result = "ABC" result "ABC" break; System.out.println(result) System.out.println System.out System System.out result String args[] args public class Main {
 
    public static void main(String args[]) {
 
        // 入力
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        sc.close();
 
        // 主処理
        String result;
        switch (s) {
            case "ABC":
                result = "ARC";
                break;
            default:
                result = "ABC";
                break;
        }
 
        // 出力
        System.out.println(result);
    }
} public class Main {
 
    public static void main(String args[]) {
 
        // 入力
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        sc.close();
 
        // 主処理
        String result;
        switch (s) {
            case "ABC":
                result = "ARC";
                break;
            default:
                result = "ABC";
                break;
        }
 
        // 出力
        System.out.println(result);
    }
} Main
import java.util.*;
 
public class Main {
 
    public static void main(String args[]) {
 
        // 入力
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        sc.close();
 
        // 主処理
        String result;
        switch (s) {
            case "ABC":
                result = "ARC";
                break;
            default:
                result = "ABC";
                break;
        }
 
        // 出力
        System.out.println(result);
    }
}