$ ./2.permute.pl 372
./2.permute.pl : permutations for 372:
  3,7,2
  3,2,7
  7,3,2
  7,2,3
  2,3,7
  2,7,3
airdish is
ARRAY(0x5621ec17ad00) ARRAY(0x5621ec17ae80) ARRAY(0x5621ec17aec8) ARRAY(0x5621ec23e770) ARRAY(0x5621ec2d4d80) ARRAY(0x5621ec2d5158)
[[3, 7, 2], [3, 2, 7], [7, 3, 2], [7, 2, 3], [2, 3, 7], [2, 7, 3]]
descending is
[[2, 7, 3], [2, 3, 7], [7, 2, 3], [7, 3, 2], [3, 2, 7], [3, 7, 2]]
$