Given sets​ A, B,​ C, and​ U, find the set B - A using the listing method.
A = {2, 3, 6}
B = {1, 2, 3, 7}
C = ​{5​, ​7}
U = ​{0, ​1, 2,​ 3, 4,​ 5, 6,​ 7}

B - A = { }