#include <bits/stdc++.h>
using namespace std;
int main()
{
	char a[257];
	int i,f=1;
	cin>>a;
	for(i=0;a[i]!='\0';i++)
	{
		if(a[i]==a[i+1])
		{
			f++;		
		}
		else if(f>1)
		{
			cout<<f<<a[i];
			f=1;
		}
		else 
		{
			cout<<a[i];
			f=1;
		}
	}
	
	
	
	
	
	
	
	
	
	return 0;
}

/**************************************************************
	Problem: 1103
	User: 21A
	Language: C++
	Result: Accepted
	Time:7 ms
	Memory:2072 kb
****************************************************************/