You're given an array of size 14. You need to determine if the array is "gold".
What does "gold" mean?
You must use all 14 numbers exactly once.

There must be:
1 pair (two identical numbers),
4 sets, where each set is either:
A triplet of identical numbers [x, x, x], OR
A consecutive increasing triplet [x, x+1, x+2].

🧪 Step 2: Try Examples and Work Through
✅ Example 1:

nums = [1, 1, 2, 2, 2, 3, 3, 3, 4, 5, 6, 7, 8, 9]
Let's try to divide this:

Pair: [1, 1]

Set 1: [2, 2, 2] — triplet
Set 2: [3, 3, 3] — triplet
Set 3: [4, 5, 6] — consecutive
Set 4: [7, 8, 9] — consecutive

✅ Yes, this array is "gold".

follow up - So instead of 14 number you are given 13 number ,

You return -1 if you cannot enter any number to make it golden  array, and if you can return the number itself.