#include <stdio.h>
#include <ctype.h>
#include <vector>
#include <algorithm>

using namespace std;

int main()
{
	freopen("input.txt", "rt", stdin);
	freopen("output.txt", "wt", stdout);
	char ch, prev = 0;
	int count = 0;
	while( scanf("%c", &ch) == 1 )
	{
		if( !isspace(ch) )
		{
			if( ch != prev )
			{
				if( prev != 0 )
				{
					printf("%d%c", count, prev);
				}
				prev = ch;
				count = 0;
			}
			count ++;
		}
	}
	printf("%d%c", count, prev);
	return 0;
}