i

M

q

r

Q

1

x 4 + x 3 + 1

x 4 + x 3 + x 2 + x + 1

x 3 + x 2 + 1

x 8 + x 4 + x 3 + x

2

x 3 + x 2

x

1

x 4 + x 3 + 1