A ‘doublet’ is a word game in which you change one word into another word, a single letter at a time. For example, DOG → DOT → COT → CAT.
See if you can do it with ASH and OAK.
‘Ash before Oak, we’re in for a soak,Oak before Ash, we’re in for a splash.’
We did it in steps. Can you do better?
Congratulations! Though with ASH out before OAK, it looks like a wet summer...