Dee Dee went to market to buy some eggs. There are 2 type of egg cartons available in the shop. One type contains 6 eggs and the other type contains 8 eggs. Dee Dee wants to buy exactly N eggs. Calculate the minimal number of egg cartons she must buy.

INPUT

First line of input gives T, the number of test cases.
T lines follow, each having N, the number of eggs.

OUTPUT

Print the minimal number of egg cartons she must buy.
If it's impossible to buy exactly n eggs, print -1.

CONSTRAINTS
1 ≤ T ≤ 50
1 ≤ N ≤ 100

SAMPLE INPUT
2
20
24

SAMPLE OUTPUT
3
3

Explanation

For first case, she should buy 2 cartons containing 6 eggs and 1 carton containing 8 eggs. In total, she buys 3 egg cartons.
For second case, there are two ways to buy 24 eggs: buy 4 cartons containing 6 eggs or buy 3 cartons containing 8 eggs. Minimize the number of cartons.
t = input()
for T in range(0,t):
	n = input()
	if n < 6:
		print -1
	elif (n % 2 != 0):
		print -1
	elif n == 10:
		print -1
	else:
		d = n / 8
		n = n % 8
		if n == 0:
			print d
		else:
			print d + 1