#include<stdio.h>

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

	char ch;

	int lt=0,lcuv=0, nrcuv=0;

	while(scanf("%c", &ch)!=EOF)

		if(ch!=EOF)
		{
			if((ch>='a' && ch<='z') || (ch>='A' && ch<='Z'))
			{
				lcuv++;

				lt++;
			}
			else
			{
				if(lcuv)
				{
					nrcuv++;
					lcuv=0;
				}
			}
		}
	printf("%d", lt/nrcuv);

	return 0;
}