#include <fstream>
#include <cstring>
using namespace std;
ifstream fi("text.in");
ofstream fo("text.out");
int litera(char c)
{
    if((c>='a'&&c<='z')||(c>='A'&&c<='Z'))
        return 1;
    return 0;
}
char C[10000000];
int i,nrl,nrc;
int main()
{
    fi.getline(C,10000000);
    for(i=0;i<=strlen(C);i++)
    {
        if(litera(C[i]) == 1)
            nrl++;
        if(litera(C[i]) == 0 && litera(C[i-1]) == 1)
            nrc++;
    }
    fo<<nrl/nrc;
    fi.close();
    fo.close();
    return 0;
}