Unexpected "ⁿh" output in i3thuan5/lomaji-tsuanuann

https://lomaji.ithuan.tw/

https://github.com/i3thuan5/lomaji-tsuanuann

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**Rule:**

* hⁿ => [Tâi-lô] nnh
* nnh => [Pe̍h-ōe-jī] hⁿ

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**Input:**

ohⁿ onnh

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**Actual unexpected:**

* [Tâi-lô] ohⁿ onnh
* [Pe̍h-ōe-jī] ohⁿ oⁿh

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**Expect:**

* [Tâi-lô] onnh onnh
* [Pe̍h-ōe-jī] ohⁿ ohⁿ