# include <stdio.h>   
# include <string.h>   
long int k,l,ok,i,q,y;
char c;
float z,x,p;
int main ()
{
freopen ("text.in","r",stdin);
freopen ("text.out","w",stdout);



q=0;
while (scanf ("%c",&c)!=EOF)
if ((c>='a' && c<='z') || (c>='A' && c<='Z'))
{
k++;
ok=1;
q=1;
}
else
if (ok==1)
{
l++;
ok=0;
}
if (q==1)
l++;
printf ("%li",k/l);

return 0;
}