#include <fstream>

using namespace std;

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

int nrl,nrc,ok;
char x;

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

        if((x >= 'a' && x <= 'z') || (x >= 'A' && x <= 'Z'))
           {
                nrl++;
                ok = 1;
           }
        else
        {
            if(ok == 1)
                nrc++;
            ok = 0;
        }
    }
    if(ok == 1)
        nrc++;
    if(nrl == 0)
        nrc++;
    g<<nrl/nrc;

    return 0;
}