#include<iostream>
#include<algorithm>
#include<string>
using namespace std;
const int INF=10000000;
int main(){
		string s;
		int ans=0;
		cin>>s;
		bool ok=false;

		for(int i=0;i<s.size();i++){
			if(i+1<s.size()&&s[i]=='m'&&s[i+1]=='i'){
					ok=true;
					i++;
					continue;
				}
				if(ok&&s[i]=='n'){
					ok=false;
					if(i+1>=s.size()||s[i+1]!='n')
					ans++;
					continue;
				}

				if(ok&&s[i]!='-'){
					ok=false;
					continue;
				}

		}
	cout<<ans<<endl;
	return 0;
}