#include<bits/stdc++.h>
using namespace std;
int main()
{
long long a=0,i;
char b[10000];
cin.getline(b,10000);
for(i=1;i<=strlen(b);i++){
if(b[i]=='l'&&b[i+1]=='u'&&b[i+2]=='o'&&b[i+3]=='g'&&b[i+4]=='u')
a++;
}
cout<<a;
}