#include <iostream>
#include <fstream>
#include <string>
#include <cstring>
using namespace std;
ifstream in("text.in");
ofstream out("text.out");
int verif(char c)
{
    if(c>='a' && c<='z')
        return 1;
    if(c>='A' && c<='Z')
        return 1;
    return 0;
}
int main()
{
    char ch;
    char last='0';
    int nrcuv=0;
    int nrl=0;
    while(in.get(ch))
    {
        if(verif(ch)==1 && verif(last)==0)
            nrcuv++,nrl++;
        else if(verif(ch)==1)
            nrl++;
        last=ch;
    }
    if(nrcuv==0 && nrl==0)
        out<<0;
    else
        out<<nrl/nrcuv;
    return 0;
}