#include <iostream>
#include <string>
using namespace std;
int main()
{
string s;cin >> s;
int state = 0;
int num = 0;
for(int i = 0; i < s.size(); i++){
if(state == 0){
if(s[i] == 'm'){
state = 1;
}
} else if (state == 1){
if(s[i] == 'i'){
state =2;
} else {
state = 0;
}
} else {
if(s[i] == '-'){
state = 2;
} else if (s[i] == 'n'){
num++;
state= 0;
} else {
state = 0;
}
}
}
cout << num << endl;
return 0;
}