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yes indeed !!! ... actually, that is what I meant to explain to you about your previous "grammar" question ... about "allos" and "allo" ... !!! ...
... Pronouns too get "cased" and the loss of the "s" in the "accusative case" is what happened in your "example" ...
As usual !!! ... I am very proud and impressed by "my" students ...
You guys make me so happy ... People "FINALLY" learning Greek is a dream of mine ... !!! ... lol ... so, thank you for making it "appear in front of me" ...



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Besides the forms: αλλουνού, αλληνής, αλλουνού which I assume are the plurals for masculine, fem, and neuter......