#include <fstream>
#include <cstring>
#define nmax 100500

using namespace std;
ifstream f("text.in");
ofstream g("text.out");
char s[nmax];
int nrCuv, nrLitere, lungSir;
int main()
{
int i;
bool nouCuv = false;
    f.getline(s, nmax);
    lungSir = strlen(s);
    for(i = 0; i < lungSir; ++i){
        if(isalpha(s[i])){
            ++nrLitere;
            if(!nouCuv){
                nouCuv = true;
                ++nrCuv;
            }
        }
        else nouCuv = false;
    }
    g<< nrLitere / nrCuv << '\n';
    return 0;
}