return True
basis = [[2, 0, 0, 0], [1, 1, 0, 0], [1, 0, 1, 0], [1, 0, 0, 1], [0, 2, 0, 
    0], [0, 1, 1, 0], [0, 1, 0, 1], [0, 0, 2, 0], [0, 0, 1, 1], [0, 0, 0, 2]]
How to connect two fock basis with their indexes?