len(mystr) = 4 mystr[1] = b mystr[1:] = bcd mystr[1:3] = bc mystr[:-2] = ab c = a c = c len(mylist) = 4 mylist[1] = x len(mylist[1:]) = 3 c = w c = y b != a c != a d != a a == b -> 0 a != b -> 1 a == y -> 1 a != y -> 0 a == n -> 0 a != n -> 1