// Saint Bonaventure University Programming Contest
// February 15, 2008

// Problem #7 - Data Compression
// Team Name: SOLUTION


#include <iostream>
using namespace std;
#include "apstring.h"

int main(void) {
	apstring conversion = "123456789ABCDEF";
	
	apstring input;
	cin >> input;
	apstring answer = "";
	
	int pos = 0;
	while (pos < input.length()) {
		char c = input[pos];
		int count = 1;
		pos++;
		while (pos < input.length() && input[pos]==c) {
			count++;
			pos++;
		}			
		answer += c;
		answer += conversion[count-1];
	}
	
	cout << answer << endl;
	return EXIT_SUCCESS;
}