#include <cstdio>
#include <cstring>
#include <cctype>
using namespace std;
int nr,tot,ok;
char ch;
int main()
{
    freopen("text.in","r",stdin);
    freopen("text.out","w",stdout);
    while(scanf("%c", &ch)!=EOF)
    {
        if(isalpha(ch)){
            tot++;
            if(!ok){
            nr++;
            ok=1;
            }
        }
        else ok=0;
    }
    printf("%d",tot/nr);
    return 0;
}