#include <fstream>
#include <cstring>
#include <cctype>
using namespace std;
ifstream fin("text.in");
ofstream fout("text.out");
int i,nrl,nrcuv,k,n;
char c;
int main()
{

    while(fin.get(c))
    {

        if(isalpha(c)!=0)
        {
            nrl++;
            if(k==0)
            {
                nrcuv++;
                k=1;
            }
        }
        else
            k=0;
    }
    if(nrcuv!=0)
        fout<<nrl/nrcuv;
    else
        fout<<0;
    return 0;
}