@$$hash_s{key} is a shorter way of writing @{ ${ $hash_s } }{key}
but you need
@{ ${ $hash_s }{key} }
which is usually written
@{ $hash_s->{key} }
as the arrow operator is more readable than the circumfix dereference.
($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord
}map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,
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