#include<iostream>
#include<cstring>
using namespace std;
int main()
{
	string a;
	cin>>a;
	int sum=0;
	for(int i=0;i<a.length()-4;i++)
	{
		if(a[i]=='l'&&a[i+1]=='u'&&a[i+2]=='o'&&a[i+3]=='g'&&a[i+4]=='u')
		{
			sum++;
		}
	}
	cout<<sum;
	return 0;
}

两个RE