#include<stdio.h>

bool lett( char x )
{
	if( x>='a' && x<='z' )
		return 1;
	if( x>='A' && x<='Z' )
		return 1;
	return 0;
}

int main()
{
	freopen("text.in","r",stdin);
	freopen("text.out","w",stdout);
	char ex=0,ch=0;
	int cuv=0,lit=0;
	while(scanf("%c",&ch)!=EOF)
	{
		if( lett(ch) )
		{
			++lit;
			if(!lett(ex))
				++cuv;
		}
		ex=ch;
	}
	printf("%d",lit/cuv);
	return 0;
}