#include<stdio.h>
#include<string.h>
int main()
{
	char a[1005] = { 0 };
	scanf("%s",a);
	int len = strlen(a);
	for (int i = 0;i < len;i++)
	{
		int j = 1;
		while (a[i + j] == a[i]&&i+j<len) j++;
		printf("%c%d", a[i], j);
		i = i+j-1;
	}
	return 0;
}