#include <fstream>

using namespace std;
ifstream in("text.in");
ofstream out("text.out");

int ok,nr,tab;
char s;
int main()
{
    in>>s;
    ok=1;
    while(in.get(s)){
        if((s>='a'&&s<='z')||(s>='A'&&s<='Z')){
            nr++;
            if(ok==1)
                tab++;
            ok=0;
        }
        else
            ok=1;
    }
    out<<nr/tab;
    return 0;
}