#include <fstream>
#include <string>
using namespace std;
ifstream in("text.in");
ofstream out("text.out");
char s[1048600];
int main()
{
    int n=0,nrc=1,nrl=0;
    //char x;
    in.getline(s,1048599,'\n');
    in.close();
    while(s[n]!=0)
    {
        if(nrl!=0 &&(s[n]=='-' || s[n]==' '))
            nrc++;
        else if((s[n]>=65 && s[n]<=90) || (s[n]>=97 && s[n]<=122))
            nrl++;
        n++;
    }
    n=nrl/nrc;
    out<<n<<"\n";
    out.close();
    return 0;
}