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package decoding;

import java.io.FileReader;

import java.io.FileWriter;

import java.io.IOException;

import java.util.HashMap;

import java.util.Map;

import java.util.Scanner;

public class Decoding {

private static Map<Integer, Character> cipher(){

Map<Integer, Character> abc = new HashMap<>();

int start = 1;

for(char i = 'A'; i <= 'Z'; i++){

abc.put(start, i);

start++;

}

abc.put(start, ' ');

return abc;

}

public static void main(String[] args) throws IOException {

int numberCount = 10;

int systemNumber = 27;

StringBuilder result = new StringBuilder();

Map<Integer, Character> abc = cipher();

Scanner sc = new Scanner(new FileReader("input.txt"));

String line = sc.nextLine();

char[] lineArray = line.toCharArray();

for(int i = 0; i < lineArray.length; i++) {

int key = 0;

if(String.valueOf(lineArray[i]).matches("[0-9]")){

key += (lineArray[i] - '0');

}else {

for(int j : abc.keySet()){

if(lineArray[i] == abc.get(j)){

key = j+numberCount-1;

}

}

}

key -= i+1;

key = key % systemNumber;

if(key == 0){

result.append(" ");

}else if(key > 0){

result.append(abc.get(key));

}else {

result.append(abc.get(abc.size() + key));

}

}

FileWriter out = new FileWriter("output.txt");

out.write(String.valueOf(result).toLowerCase());

out.close();

}

}