#include <fstream>
#include <cstring>

using namespace std;
int n,i,nr=0,t,l=0,x;
char s[100001];
int main()
{
    ifstream f("text.in");
    ofstream g("text.out");
     f.getline(s,10001);
     for(i=0;i<=strlen(s)-1;i++)
     {
        if((s[i]==' '||s[i]=='-')&&('a'<=s[i+1]<='z'||'A'<=s[i+1]<='Z'))nr++;
            if(('a'<=s[i]&&s[i]<='z')||('A'<=s[i]&&s[i]<='Z'))l++;}
    x=l/nr;
    g<<x;
    return 0;
}