#include <iostream>
#include <fstream>

using namespace std;

int main()
{ifstream f("text.in");
ofstream g("text.out");
char c;
int nrc=0,nrt=0,n=0;
while(!f.eof())
    {f.get(c);
     if((c>='a'&&c<='z')||(c>='A'&&c<='Z'))
        {nrt++;
        n++;
        }
     else
        {if(n)
            nrc++;
        n=0;
        }
    }
g<<nrt/nrc;

return 0;
}