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

int main(){
	string s;
	cin>>s;
	int sum=0;
	for(int i=0;i<=s.size()-5;i++)
		if(s[i]=='l'&&s[i+1]=='u'&&s[i+2]=='o'&&s[i+3]=='g'&&s[i+4]=='u')
			sum++;
	cout<<sum<<endl;
	return 0;
}