#include <fstream>
#include <string.h>

using namespace std;
ifstream f("text.in");
ofstream g("text.out");
int main()
{
    char ch[255];
    int lc=1,nc=1,i,n;

    while (!f.eof())
    {
        do
        f>>ch[0];
        while(!isalpha(ch[0]))
        f.getline(ch,255);
        n=strlen(ch);
        for (i=0;i<n;i++)
            if (isalpha(ch[i]))
            lc++;
            else if (isspace(ch[i]) || ch[i]=='-')
                nc++;
    }
    g<<lc/nc;

    return 0;
}