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/******************************************************************************

                              Online C++ Compiler.
               Code, Compile, Run and Debug C++ program online.
Write your code in this editor and press "Run" button to compile and execute it.

*******************************************************************************/

#include <iostream>

using namespace std;

int main()
{
    int n,w = 0, p;
    
    bool czy = false;
    
    string s;
    
    cin >> n;

    cin >> s;
    
    p = n/10;
    
    for(int i = 0; i < n; ++i)
    {
        if(i == p)
        {
            if(czy == false)
                w++;
                
            p += n/10;
            
            czy = false;
        }
        
        if(s[i] == 'N')
            czy = true;
        
    }
    
    if(czy == false)
        w++;
    
    cout << w;
    
    return 0;
}