#include <iostream>
#include <string>
using namespace std;
ifstream cin("text.in");
ofstream cout("text.out");
int main()
{
    int i,nrl=0,nrc=0;
    string s;
    getline(cin,s);
    s.push_back('.');
    for(i=0;i<s.size();i++)
    {
        if((s[i]>='A' && s[i]<='Z') || (s[i]>='a' && s[i]<='z'))
        {
            nrl++;

        }
        else
        {
            if(i!=0 && ((s[i-1]>='A' && s[i-1]<='Z') || (s[i-1]>='a' && s[i-1]<='z')))
                nrc++;
        }

    }
    cout<<nrl/nrc;
    return 0;
}