#include<stdio.h>


int le;
int nr;


int main()
{
        freopen("text.in","r",stdin);
        freopen("text.out","w",stdout);
        int ver=0;
        char c='a';
        while(c!='\n')
        {
                scanf("%c",&c);
                if (!(('a'<=c&&c<='z')||('A'<=c&&c<='Z')))
                {

                        if (ver)nr++;
                        ver=0;
                }
                else
                {
                        ver=1;
                        le++;
                }
        }
        printf("%d",le/nr);
        return 0;
}