B

import java.io.*;
import java.util.*;

public class Solution {
    public static BufferedReader in;
    public static PrintWriter out;
    public static StringTokenizer st;

    public static void main(String[] args) throws IOException {
        in = new BufferedReader(new InputStreamReader(System.in));
        out = new PrintWriter(new OutputStreamWriter(System.out));
        new Solution().solve();
        out.close();
    }

    String line;

    public void solve() throws IOException {
        line = next();
        int n = line.length();

        Map<Integer, Integer> brackets = new HashMap<>();
        Stack<Integer> leftBrackets = new Stack<>();

        for (int i = 0; i < n; i++) {
            if (line.charAt(i) == '(') {
                leftBrackets.add(i);
            }
            if (line.charAt(i) == ')') {
                int start = leftBrackets.pop();
                brackets.put(start, i);
            }
        }

        System.out.println(process(1, n - 2));

    }

    String process(int l, int r) {
        StringBuilder number = new StringBuilder();
        while (Character.isDigit(line.charAt(l))) {
            number.append(line.charAt(l));
            ++l;
        }


        int n = Integer.parseInt(number.toString());
        StringBuilder res = new StringBuilder();

        String process = process(l, r);
        for (int i = 0; i < n; i++) {
            res.append(process);
        }

        return res.toString();
    }

    String next() throws IOException {
        while (st == null || !st.hasMoreTokens()) {
            st = new StringTokenizer(in.readLine());
        }

        return st.nextToken();
    }

    int nextInt() throws IOException {
        return Integer.parseInt(next());
    }

    long nextLong() throws IOException {
        return Long.parseLong(next());
    }
}