#include<cstdio>
int main()
{
    int ok=0,nrcuvinte=0,lungimetotala=0;
    char c;
    freopen("text.in","r",stdin);
    freopen("text.out","w",stdout);
    for(;scanf("%c",&c)+1;)
    {
        if(!ok)
        {
            if((c>='a'&&c<='z')||(c>='A'&&c<='Z')) {ok=1; lungimetotala++; nrcuvinte++;}
        }
        else
        {
            if((c>='a'&&c<='z')||(c>='A'&&c<='Z')) {lungimetotala++;}
            else {ok=0;}
        }
    }
    printf("%d\n",lungimetotala/nrcuvinte);
    return 0;
}