#include<stdio.h>
int u,lit,l,cuv;

int main()
{
	freopen("text.in","r",stdin);
	freopen("text.out","w",stdout);
	scanf("%c",&u);
	if(u>='A' && u<='Z' || u>='a' && u<='z')
		lit++;
	while(scanf("%c",&l)!=EOF)
	{
		if(l>='A' && l<='Z' || l>='a' && l<='z' && u>='A' && u<='Z' || u>='a' && u<='z')
			lit++;
		else
		{
			cuv++;
		}
		u=l;
	}
	printf("%d",lit/cuv);
	return 0;
}