{ hole dup 1 { @ execute } does create 1 ' ! does create } : defvect
defvect sort :sort
defvect merge :merge
defvect less :less
' < :less
{ null null rot
  { dup null? not }
  { uncons swap rot cons -rot } while drop
} : split
{ dup null? { drop } {
    over null? { nip } {
      over car over car less ' swap if
      uncons rot merge cons
    } cond
  } cond
} :merge
{ dup null? {
    dup cdr null? {
      split sort swap sort merge
    } ifnot
  } ifnot
} :sort
3 1 4 1 5 9 2 6 5  9 list
dup .l cr sort .l cr
"once" "upon" "a" "time" "there" "lived" "a" "very" "little" "kitten"  10 list
{ $cmp 0< } :less
dup .l cr sort .l cr