in reply to Using Positions from one array to find the value in the same position of another.

Just use @indexes to retrieve data from @numbers2. You can use an array slice: 
my @new = @numbers2[@indexes];

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For longer sentences, you might notice that the first_index loop is too slow. A hash from words to positions would be much faster to find the position.

($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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In Section Seekers of Perl Wisdom