Rubah dan Ayam

import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Solution {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String farm = sc.nextLine(), state = "";
        boolean isInCage = false, isFoxOut = false, foxInCage = false;
        for (int i = 0, j = 0; i < farm.length(); i++) {
            switch (farm.charAt(i)) {
                case '[':
                    isInCage = true;
                    break;
                case ']':
                    if (!foxInCage) state += "0";
                    else foxInCage = false;
                    isInCage = false;
                    break;
                case 'R':
                    if (!isInCage) isFoxOut = true;
                    else {
                        foxInCage = true;
                        state += "1";
                    }
                    break;
                default: break;
            }
        }
        for (int i = 0, j = 0; i < farm.length(); i++) {
            char c = farm.charAt(i);
            switch(c) {
                case '[':
                    isInCage = true;
                    break;
                case ']':
                    j++;
                    isInCage = false;
                    break;
                case 'A':
                    if (!isInCage) { if (isFoxOut) c = '.'; }
                    else if (state.charAt(j) == '1') c = '.';
                    break;
                default: break;
            }
            System.out.print(c);
        }
    }
}