#include<stdio.h>  
   #include<string.h>  
   int what(char c)  
   {  
        if(c>='a'&&c<='z'||c>='A'&&c<='Z')  
           return 1;  
       return 0;  
   }  
    int main()  
   {  
       char board[131000];  
       long long overall=0,words=0,enter=0,i,n;  
       freopen("text.in","r",stdin);  
       freopen("text.out","w",stdout);   
       for(i=0;i<n;++i)  
       {  
           enter=0;  
        scanf("%c",board+i);  
	 while(what(board[i])&&i!=n)  
           {  
               
	if(entr)
		scanf("%c",board+i);
		if(!enter)  
               {  
                   ++words;  
                   enter=1;  
               }  
               ++overall;  
           ++i;  
           }  
       }  
	  // printf("%lld %lld\n",overall,words);
	   overall/=words;
       printf("%lld",overall);  
   }