def test_treap(): exercise_sset(ods.SkiplistSSet())
def test_bst(): exercise_sset(ods.BTree(11))
def test_bst(): exercise_sset(ods.XFastTrie())
def test_bst(): exercise_sset(ods.ScapegoatTree())
def test_rbt(): exercise_sset(ods.RedBlackTree())
def test_bst(): exercise_sset(ods.BinarySearchTree())
def test_bst(): exercise_sset(ods.BinaryTrie())
def test_treap(): exercise_sset(ods.Treap())