TSR-100

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

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

        String encryptedMessage = scanner.nextLine();
        //String encryptedMessage = "this forbidden mess of an age rating 0127504740";
        List<Integer> numbers = new ArrayList<>();
        StringBuilder symbolsSB = new StringBuilder();

        for (int i = 0; i < encryptedMessage.length(); i++) {
            char symbol = encryptedMessage.charAt(i);
            if (Character.isDigit(symbol)) {
                String tmp = symbol + "";
                numbers.add(Integer.parseInt(tmp));
            } else {
                symbolsSB.append(symbol);
            }
        }
        String symbols = symbolsSB.toString().trim();
        List<Integer> takeList = new ArrayList<>();
        List<Integer> skipList = new ArrayList<>();

        for (int i = 0; i < numbers.size(); i++) {
            if (i % 2 == 0) {
                takeList.add(numbers.get(i));
            } else {
                skipList.add(numbers.get(i));
            }
        }

        StringBuilder finalString = new StringBuilder();
        for (int i = 0; i < skipList.size(); i++) {
            //take
            int take = takeList.get(i);
            if (take > symbols.length()){
                take = symbols.length();
            }
            finalString.append(symbols, 0, take);
            symbols = symbols.substring(take);
            //skip
            int skip = skipList.get(i);
            if (skip > symbols.length()){
                skip = symbols.length();
            }
            symbols = symbols.substring(skip);
        }
        System.out.println(finalString);
    }
}