#include <iostream>
#include <fstream>
#include <string>
using namespace std;
ifstream in ("text.in");
ofstream out("text.out");
string s;
int lent=0, nrcuv=0;
int main()
{
    getline(in, s);
    if(isalpha(s[0])) lent++, nrcuv++;
    for(int i=1; i<s.size(); i++)
        if(isalpha(s[i]))
        {
            if(!isalpha(s[i-1]))
                nrcuv++;
            lent++;
        }

    out<<lent/nrcuv;
    return 0;
}