#include <fstream>

using namespace std;

ifstream f("text.in");
ofstream g("text.out");

int nrl,nrc;
char x,y;

int main()
{
    nrl = 0;
    nrc = 0;
    while(f.get(x))
    {

        if(x >= 'a' && x <= 'z' || x >= 'A' && x <= 'Z')
            nrl++;

        if(x == '-' && nrl > 0)
            nrc++;

        if(x == ' ' && nrl > 0)
            nrc++;

        if(x == '\n')
            nrc++;
    }

    g<<nrl/nrc;

    return 0;
}