i1 : set{1,2,3,1,2,4} o1 = set {1, 2, 3, 4} o1 : Set
i2 : elements oo o2 = {1, 2, 3, 4} o2 : List
i3 : tally apply(10, i -> random 5) o3 = Tally{1 => 2} 2 => 1 3 => 4 4 => 3 o3 : Tally
i4 : elements oo o4 = {1, 1, 2, 3, 3, 3, 3, 4, 4, 4} o4 : List