use Test; sub sort-string(Str() $string) { $string.words.map({ $1 => $0 if /^(\w+)(\d+)$/ }).sort>>.value.join: " " } is sort-string( "and2 Raku3 cousins5 Perl1 are4" ), "Perl and Raku are cousins"; is sort-string( "guest6 Python1 most4 the3 popular5 is2 language7" ), "Python is the most popular guest language"; is sort-string( "Challenge3 The1 Weekly2" ), "The Weekly Challenge";