#include<bits/stdc++.h>
using namespace std;
int main()
{
	string s0 = "0",s1;
	cin>>s1;
	int sz = sizeof(s1)-1;
	s0+=s1;
	for(int i = 0;i<sz-1;i++)
	{
		cin>>s1;
		s0+=s1;
	}
	int count_0 = 0,count_1 = 0;
	int flag = 0;
	cout<<sz<<" ";
	for(int i = 1;i<=sz*sz;i++)
	{
		flag = s0[i]-'0';
		if(s0[i] == '1')
			count_1++;
		else if(s0[i] == '0')
			count_0++;
		if(s0[i]!=s0[i-1])
		{
			if(flag)
			{
				cout<<count_0;
				count_0 = 0;
			}
			else
			{
				cout<<count_1;
				count_1 = 0;
			}
		}
		if(i == sz*sz)
		{
			if(flag)
				cout<<count_1;
			else
				cout<<count_0;
		}
	}
	return 0;
}