Lucky Seven

Given an array of numbers, return whether it is possible to make the number 7 by adding any three different numbers together.

Examples

luckySeven([2, 4, 3, 8, 9, 1]) ➞ true

luckySeven([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]) ➞ true

luckySeven([0, 0, 0, 2, 3]) ➞ false
// You cannot repeat the same number to make 2 + 2 + 3 = 7

luckySeven([4,, 3]) ➞ false
// You need three different numbers.

Notes

• Tests will only include numbers.
• Trivially, any array with a length of less than two automatically fails the test.