#include<stdio.h>
#include<string.h>
#include<ctype.h>

char c,s[1050];

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

int num=0,i=0,lim=0,num2=0;

while(scanf("%c",&c)!=EOF)
     {
     if(isalpha(c))
       num++;
     s[i]=c;
     i++;
     }

lim=strlen(s);

for(i=0;i<lim;i++)
   {
   while(isalpha(s[i]))
	i++;
   if(!isalpha(s[i]) && isalpha(s[i-1]))
     num2++;
   }

int rez;

rez=num/num2;

printf("%d\n",rez);

fcloseall();
return 0;
}