#include<bits/stdc++.h>
using namespace std;

int a[40001];

int main(){
	char c,l = '0';
	int len = 0;
	int ans = 0;
	while(cin>>c){
		len++;
		if(c == l){
			a[ans]++;
		}else{
			ans++;	
			a[ans] = 1;
			l = c;
		}
	}
	cout<<sqrt(len);
	for(int i = 0;i <= ans;i++){
		cout<<" "<<a[i];
	}
	return 0;
}