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
41
42
43
44
45
46
47
48
#include<bits/stdc++.h>
using namespace std;


#define st first
#define nd second
#define pb push_back
#define sz(x) (int)x.size()
#define all(x) x.begin(),x.end()
#define sor(x) sort(all(x))
#define rev(x) reverse(all(x))
#define rsz(x) resize(x)
#define BOOST ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);

typedef long long ll;
typedef pair<int,int>pii;
typedef long double ldl;
typedef pair<ll,ll>pll;
typedef vector<int> vi;
typedef vector<ll> vl;
typedef vector<pii> vii;
typedef vector<pll>vll;
typedef unsigned long long ul;


int main()
{
	int n;
	string s;
	cin>>n>>s;
	int ans=0;
	int k = n/10;
	bool ok;
	for(int i = 0 ; i  < 10 ; i++)
	{
		ok = true;
		for(int j = 0 ; j < k ; j++)
			if(s[i*k+j]=='N')
			{
				ok = false;
				break;
			}
		if(ok)
			ans++;
	}
	cout<<ans<<'\n';
	return 0;
}