//#include <iostream>
#include <fstream>
using namespace std;

int main()
{
    ifstream cin("text.in");
    ofstream cout("text.out");
    int nr=0,lung=0,ok=0;
    char ch;
    while(cin.get(ch)){
        if((ch<='Z' and ch>='A' )or(ch<='z' and ch>='a')){
            lung++;
            ok=1;
        }
        else{
            if(ok==1)
                nr++;
            ok=0;
        }
    }
    //cout<<lung<<" "<<nr<<"\n";
    cout<<lung/nr;
    return 0;
}