#include<iostream>
#include<cstring>

using namespace std;
string state;

int main()
{
    cin >> state;

    for(int i = 0; i < state.size(); i ++)
    {
        if(state[i + 1] >= '1' && state[i + 1] <= '9')
            for(int j = state[i + 1] - '0'; j > 0 ; j --)
                cout << state[i];
        else if(state[i] > '9')
            cout << state[i];

    }


    return 0;
}