#include <iostream>
#include <fstream>
#include <cstring>
using namespace std;
ifstream fin("text.in");
ofstream fout("text.out");
int main()
{
    char x,v[300001];
    int ok=0,lit=0,cuv=0;
    fin.getline(v,300001);
    for(int i=0;i<strlen(v);i++)
    {
        if(v[i]>='a'&& v[i]<='z'|| v[i]>='A' && v[i]<='Z')
        {
            lit++;
            if(ok==0){ok=1;cuv++;}
        }
        else {ok=0;}
    }
    fout<<lit/cuv;
    return 0;
}