#!/bin/env raku
my %hash =
(
   '40:A_B' => 1,
   '22:jfdks' => 1,
   '3:fjdksf' => 1,
   '8:Q_Z' => 1,
   '2:interview' => 1
);

for %hash.keys -> $k {
    say 'k: ',$k;
}
say '---------- Sorted ---------------';
for %hash.keys.sort({$^a.split(':').head.Int <=> $^b.split(':').head.Int}) -> $k {
    say 'k: ', $k;
}