#include <cstdio>

int main()
{
	freopen("text.in","r",stdin);
	freopen("text.out","w",stdout);
	int medie=0,nrc=0,lg=0;
	char c;
	for(;!feof(stdin);) {
		scanf("%c",&c);
		if(('a'<=c && 'z'>=c) || ('A'<=c && 'Z'>=c)) ++medie,++lg;
		else if( ' '==c && lg) ++nrc,lg=0;
		else if(lg) lg=0,++nrc;
	}
	medie/=nrc;
	printf("%d\n",medie);
	return 0;
}