#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[131080];
	int overall=0,words=0,enter=0,i,n;
	freopen("text.in","r",stdin);
	freopen("text.out","w",stdout);
	gets(board);
	n=strlen(board);
	for(i=0;i<n;++i)
	{
		enter=0;
		while(what(board[i])||i==n)
		{
			if(!enter)
			{
				++words;
				enter=1;
			}
			++overall;
		++i;
		}
	}
	printf("%d",overall/words);
}