#include<bits/stdc++.h>
using namespace std;
string a;
int main()
{
    int ans=0;
    cin>>a;
    for(int i=0;i<a.size();i++)
    {
    	if(a[i]='l' && a[i+1]=='u' && a[i+2]=='o'&& a[i+3]=='g'&& a[i+4]=='u')
    	ans++;
	}
	cout<<ans;
}