#include <bits/stdc++.h>
using namespace std;
string a[10001],s;
int j = 0;
char c = '0';
int main(){
	while(cin >> a[j])
		j++;
	cout << j << " ";
	s = a[0];
	for(int i = 1;i < j;i++)
		s = s + a[i];
	int count = 0;
	for(int i = 0;i < s.size();i++){
		if(s[i] == c)
			count++;
		else{
			cout << count << " ";
			count = 1;
			c = 1 - c;
		}
	}
	return 0;
}

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