#Japt, 18 bytes

Æ=ìG ®%9ª9Ãì)sGÃæÑ 

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Japt, 18 bytes

Æ=ìG ®%9ª9Ãì)sGÃæÑ 

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#Japt, 20 bytes

Set out on this determined to beat Kamil's solution but was stuck on 21 for a good while until I borrowed a trick from him & tweaked it so, if you're upvoting me, please upvote him too. (Convinced there has to be a shorter way, though!)

Æ=ìG ®+zA)uAÃì)sGÃæÑ 

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#Japt, 18 bytes

Æ=ìG ®%9ª9Ãì)sGÃæÑ 

Try it