@String/Cons = (a (b ((@String/Cons/tag (a (b c))) c)))

@String/Cons/tag = 1

@String/Nil = ((@String/Nil/tag a) a)

@String/Nil/tag = 0

@main = l
  & @String/Cons ~ (104 (k l))
  & @String/Cons ~ (101 (j k))
  & @String/Cons ~ (108 (i j))
  & @String/Cons ~ (108 (h i))
  & @String/Cons ~ (111 (g h))
  & @String/Cons ~ (44 (f g))
  & @String/Cons ~ (32 (e f))
  & @String/Cons ~ (119 (d e))
  & @String/Cons ~ (111 (c d))
  & @String/Cons ~ (114 (b c))
  & @String/Cons ~ (108 (a b))
  & @String/Cons ~ (100 (@String/Nil a))