#ifndef ONLINE_JUDGE
#define _GLIBCXX_DEBUG
#endif
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using ll=long long;
using ld=long double;
using st=string;
using P=pair<ll,ll>;
typedef atcoder::modint mint;
ll inf=9e18;
template<typename T, int s, int i = 0>
auto vec(const ll (&sizes)[s], const T& init = T()){
  if constexpr(i < s) return vector(sizes[i], vec<T, s, i+1>(sizes, init));
  else return init;
}


int main(){
  ll n,a=0;
  st s;
  cin>>n>>s;
  if(s[n-5]!='H'){s[n-5]='H';a++;}
  if(s[n-4]!='A'){s[n-4]='A';a++;}
  if(s[n-3]!='P'){s[n-3]='P';a++;}
  if(s[n-2]!='P'){s[n-2]='P';a++;}
  if(s[n-1]!='Y'){s[n-1]='Y';a++;}
  for(ll i=0;i<n-5;i++){
    if(s[i]=='H'&&s[i+1]=='A'&&s[i+2]=='P'&&s[i+3]=='P'&&s[i+4]=='Y'){
      a++;
    }
  }
  cout<<a<<"\n";
}