The Wikipedia snippet below is not backed by a reliable source. Can you find one?
Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!
In page Middle English:
"Nouns of the weak declension are primarily inherited from Old English n-stem nouns but also from ō-stem, wō-stem, and u-stem nouns,[citation needed] which did not inflect in the same way as n-stem nouns in Old English, but joined the weak declension in Middle English. Nouns of the strong declension are inherited from the other Old English noun stem classes.