#include <fstream>

using namespace std;
ifstream f("text.in");
ofstream g("text.out");
char c;
long long k,l,ok;
int main()
{
   while(f.get(c)){
    if(isalpha(c))
    {
        ok=1; k++;
    }
    else
        if(ok) l++, ok=0;
   }
   g<<k/l;
    return 0;
}