Remove Surrounding Duplicate Items

Create a function that takes a sequence of either strings or integers, removes the surrounding duplicates and returns a list of items without any items with the same value next to each other and preserves the original order of items.

Examples

unique_in_order("AAAABBBCCDAABBB") ➞ ["A", "B", "C", "D", "A", "B"]

unique_in_order("ABBCcAD") ➞ ["A", "B", "C", "c", "A", "D"]

unique_in_order([1, 2, 2, 3, 3]) ➞ [1, 2, 3]

Notes

• The initial sequence of items can be either a string or a list.
• Tests are case sensitive.