import java.util.*;

public class CharacterAndFrequency

{

public static void main(String[] args)

{

Scanner in = new Scanner(System.in);

String str = in.next();

Character letter=' ';

String number = "";

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

{

if(!(str.charAt(i) >= '0' && str.charAt(i) <= '9')) //if alphabet

{

if(!number.equals(""))

{

int n = Integer.parseInt(number);

for(int j=0;j<n;j++)

{

System.out.print(letter);

}}

letter = str.charAt(i);

number = "";

}

else{ //if number

number = number + (str.charAt(i) + "");

}

}

int n = Integer.parseInt(number);

for(int j=0;j<n;j++)

{

System.out.print(letter);

}

in.close();

}

}