#include <iostream>
#include <cstring>

using namespace std;

int main() {
	char s[4000], aux[4000];
    int k = -1, nr;
    cin.getline(s, 2000, 0);
    int lg = strlen(s);
    for (int a = 0; a < lg; ++a){
        if (isalpha(s[a])){
                nr = 1;
            if (s[a] == s[a + 1]){
                do {
                    ++nr;
                    ++a;
                }
                while(s[a] == s[a + 1]);
            }
                ++k;
                aux[k] = '0' + nr;
                ++k;
                aux[k] = s[a];
        }
        else {
            ++k;
            aux[k] = s[a];
        }
    }
    strcpy(s, aux);
    cout << s;
	return 0;
}