If I'm not missing something you can generalize the principle to any number of parameters. Parameters you don't need are undef or garbage, but that should not matter

$searchString = "(T)(est).(.{2}).*";
$outputString = 'This $3 a $1$2';
$sampleData = "Test is good";

if ($sample_data =~ m/$search_string/)
{
    say $make_output_string->($1,$2,$3,$4,$5,$6,$7,$8);
}
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