#include <fstream>
#include <string>
using namespace std;
ifstream fin("text.in");
ofstream fout("text.out");

int main()
{
    int cuv=0,lit=0;
    string s;
    getline(fin,s);
    for(int i=0;i<s.size();i++)
    {
        if(isalpha(s[i])&&!isalpha(s[i+1]))
        cuv++;
        if(isalpha(s[i]))
        lit++;
    }

    fout<<lit/cuv;




}