#include <cstdio>
using namespace std;
int l,ok,nc;
char c;
int main()
{
    freopen("text.in","r",stdin);
    freopen("text.out","w",stdout);
    while(scanf("%c",&c) && c!=10)
        if((c>='a' && c<='z') || (c>='A' && c<='Z'))
        {
            l++;
            ok=0;
        }
        else
            if(l && !ok)
            {
                nc++;
                ok=1;
            }
    l/=nc;
    printf("%d",l);
    return 0;
}