#include <iostream>
#include <fstream>
using namespace std;
int n,i,cuv,nr;
string s;
int main()
{
    ifstream f("text.in");
    ofstream g("text.out");
    getline(f,s);
    n=s.size();
    for(i=0;i<n;i++)
    {

        if(((s[i]<='z')&&(s[i]>='a'))||((s[i]<='Z')&&(s[i]>='A')))
        {cuv++;
        while((((s[i]<='z')&&(s[i]>='a'))||((s[i]<='Z')&&(s[i]>='A')))&&(i<n))
        {
            nr++;
            i++;
        }}
    }
    g<<nr/cuv;

    return 0;
}