#include <stdio.h>
using namespace std;

char a;
int lg,nr,x=0;

int main()
{
freopen("text.in","r",stdin);
freopen("text.out","w",stdout);

while((a=getchar())!=EOF)
{
    if((('A'<=a)&&(a<='Z'))||(('a'<=a)&&(a<='z')))
    {nr++;
    x=0;}
    else
    x++;

    if(x==1&&nr!=0)
    lg++;
}

printf("%d",nr/lg);

    return 0;
}