#include <fstream>
#include <bits/stdc++.h>
using namespace std;
ifstream fin("cuvinte.in");
ofstream fout("cuvinte.out");
char i[1000];
int main()
{
    fin.getline(i,1000);
    int x,nrcuv=0,nrlit=0,inceputcuv=0;
    for(x=0;x<=strlen(i)-1;x++)
    {
        if((i[x]>=65&&i[x]<=90)||(i[x]>=97&&i[x]<=122))
        {
            nrlit++;
            if(inceputcuv==0)
            {
                inceputcuv=1;
                nrcuv++;
            }
        }
        else
        {
            inceputcuv=0;
        }

    }
    fout<<nrlit/nrcuv;
    return 0;
}