#include <fstream>
using namespace std;

ifstream fin("text.in");
ofstream fout("text.out");

int main()
{
    char c;
    int lit=0, ncuv=0;
    bool cuv=false;
    while(fin.get(c))
    {
        if((c>='a'&&c<='z') || (c>='A'&&c<='Z'))
        {
            if(!cuv)
                ncuv++, cuv=true;
            lit++;
        }
        else
            cuv=false;
    }
    fout<<lit/ncuv;
    return 0;
}