List Remove Duplicates

a = [1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89]
b = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12,55,40,20,13]
c=[]

for j in b:
    if j not in a:
        c.append(j)

for i in a:
    if i not in b:
        c.append(i)

print(c)