#include <fstream>
#include <cstring>

using namespace std;

ifstream cin("text.in");
ofstream cout("text.out");

const int LIM=1000005;
int n, nrl, nrc;
char s[LIM];
int main()
{
	cin.get(s, LIM);
	n=strlen(s);
	for(int i=0; i<=n; ++i)
        if(('a'<=s[i] and s[i]<='z') or ('A'<=s[i] and s[i]<='Z'))
            nrl++;
        else
            if(('a'<=s[i-1] and s[i-1]<='z') or ('A'<=s[i-1] and s[i-1]<='Z'))
                nrc++;
    if(!nrc)
        cout<<0;
    else
        cout<<nrl/nrc;
    return 0;
}