#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;
}