#include <iostream>
#include <algorithm>
#include <cstdio>
#include <string>

#define ll long long

using namespace std;

int main(){

   string s;
   cin>>s;
   int cnt=0;
   int state=0;
   for(int i=0;i<s.length();++i){
       if(state==0&&s[i]=='m') state=1;
       else if(state==1&&s[i]=='i') state=2;
       else if(state==2&&s[i]=='n'){
           state=0;
           cnt++;
       }else if(state==2&&s[i]=='-') state=2;
       else state=0;
   }
   cout<<cnt<<endl;
   return 0;
}