#include <stdio.h>
#define NR 1050000
int main()
{
	freopen("text.in","r",stdin);
	freopen("text.out","w",stdout);
	int litere=0,cuv=0,k=0;
	char x,y;
	while (scanf("%c",&x)!=EOF)
	{
		if ((x>='a' && x<= 'z') || (x>='A' && x<= 'Z'))
		{
			litere++;
			if (k==0)
				cuv+=1;
			k=1;
		}
		else
			k=0;
	}
	printf("%d",litere/cuv);
	return 0;
}