#include <cstdio>
#include <cstring>
using namespace std;
char x;
int s,k,t,q;
int main()
{
    freopen("text.in","r",stdin);
    freopen("text.out","w",stdout);
    while(scanf("%c",&x)!=EOF)
    {
        if((x<='z'&&x>='a')||(x<='Z'&&x>='A'))
        {
            k++;s=1;
        }
        else
        if(s==1) {t++;s=0;}
    }
    q=k/t;
    printf("%d ",k/t);

    return 0;
}