list [1,2,3,3]
list {2,3,1,2}
list ⟅2,3,1,2⟆
bag  [1,2,3,3]
bag  {2,3,1,2}
bag  ⟅2,3,1,2⟆
set  [1,2,3,3]
set  {2,3,1,2}
set  ⟅2,3,1,2⟆
let sort : List(N) -> List(N) = \l. list (bag l) in sort [1,5,2,6,6,3]