#include <fstream>
#include <cstring>

using namespace std;

int main()
{
    ifstream cin("text.in");
    ofstream cout("text.out");
    char a [ 200 * 200 ];
    int L = 0 , C = 0;
      cin.getline ( a , 200 * 200);
         for ( int i = 0 ; i < strlen(a) ; i++){
             if ( isalpha ( a[ i ]))
               L++;
             else{
               while (!isalpha (a[ i ]))
                 i++;
               C++;
               L++;}}
        cout << ( L - 1 )/ (C - 1);}