1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
#include <bits/stdc++.h>
#define ll long long
#define llu long long unsigned
#define ld long double
#define fr(i,n) for(int i=0;i<n;i++)
#define fr2(i,l,r) for(int i=l;i<r;i++)
#define watch(x) cout<<(#x)<<"=="<<(x)<<endl
#define ft first
#define sc second
#define pb push_back
#define vi vector<int>
#define pii pair<int,int>
using namespace std;



int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(NULL);
    cout.tie(NULL);
    int T; cin>>T;
    string s; cin>>s;
    int step=T/10,res=0;
    for(int i=0;i<10;i++) {
        //watch(i); watch(res);
        int reward=1;
        //watch(step);
        for(int j=0;j<step;j++) {
            //watch(i*step+j);
            if(s[i*step+j]=='N') {
                reward=0;
                break;
            }
        }
        res+=reward;
    }
    cout<<res<<'\n';

    return 0;
}