#include <fstream>
#include <cstring>

using namespace std;

ifstream fin("text.in");
ofstream fout("text.out");

string s;

bool verifliterea(char c)
{
    if (('a'<=c&&c<='z')||('A'<=c&&c<='Z'))
        return 1;
    return 0;
}

int main()
{
    int nr=0,cnt=0;
    getline(fin,s);
    for (int i=0;i<s.size();i++)
    {
        //fout<<verifliterea(s[i])<<' '<<s[i]<<endl;
        if (verifliterea(s[i])==1)
            nr++;
        else
        {
            if ((i-1)>=0&&verifliterea(s[i-1])==1)
                cnt++;
        }
    }
    if (verifliterea(s[s.size()-1])==1)
        cnt++;
    fout<<nr/cnt;
     return 0;
}