I opened the west wing chest while i had the following keys in my inventory:
- West wing key
- East wing key
- Rusty key
- Painted key
- Library key
- Magic key
- Strange key
I havent looked at the key text when opened the chest but by the look of it its either:
- East wing key
- Painted key
- Library key
if the new version havent changed it only contains a lvl 4 card which the site one is simpler (for me at least)