a,b,*c,d - Tuples

Question

a, b, *c, d = [1, 2, 3, 4, 5, 6, 7, 8, 9]
print(a)
print(b)
print(c)
print(d)

How does python interpret that a new variable d will be defined after c which makes c take values from 3 to 8 and leave 9 for d ?