#include<iostream>
#include<fstream>
#include<string.h>
using namespace std;
int main()
{
    ifstream f("date.in");
    ofstream g("date.out");
    int i,nr=1,nr2=0;
    char s[90];
    f.get(s,89);
    for(i=0;i<strlen(s);i++)
    {
        if(s[i]==' ' && s[i+1]!=' ' || s[i]=='-')
            nr++;
        if(s[i]>='a' && s[i]<='z' || s[i]>='A' && s[i]<='Z')
            nr2++;
    }
    g << nr2/nr;
    return 0;
}