#include <stdio.h>
#include <iostream>
#include <string>
#include <fstream>
using namespace std;

int main() {
	string line;
	ifstream in("encoding.in");
	while(getline(in,line)) {
		int len = line.size();
		int i = 0;
		while(i<len) {
			int cnt = 1;
			while(i+cnt<len && line[i+cnt] == line[i] && cnt<9)
				cnt++;
			if (cnt == 1) {
				printf("1");
				while(i<len) {
					if (i+1<len && line[i+1] == line[i])
						break;
					printf("%c",line[i]);
					if (line[i] == '1') printf("1");
					i++;
				}
				printf("1");
			}
			else {
				printf("%c%c",'0'+cnt,line[i]);
				i += cnt;
			}
		}
		printf("\n");
	}
	return 0;
}