This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include<bits/stdc++.h>
using namespace std;
#define lalala ios_base::sync_with_stdio(false);cin.tie(NULL);
//#define endl '\n'
#define ll long long
int main(){
string str;cin>>str;
int n=str.length();
int a,b,c,d;a=b=c=d=0;
int cev=0;
for(int i=0;i<n;i++){
if(str[i]=='H')a=1;
if(str[i]=='O'&&a)b=1;
if(str[i]=='N'&&a&&b)c=1;
if(str[i]=='I'&&a&&b&&c)d=1;
if(a&&b&&c&&d){
cev++;
a=b=c=d=0;
}
}
cout<<cev<<endl;
}
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