L 1

L 2

R 1

( 0 1 2 3 4 5 6 7 0 1 0 1 0 1 0 1 )

( 0 1 2 3 4 5 6 7 2 1 2 1 2 1 2 1 )

R 2

( 0 1 2 3 4 5 6 7 0 1 0 1 0 1 2 1 )

( 0 1 2 3 4 5 6 7 2 1 2 1 2 1 0 1 )

R 3

( 0 1 2 3 4 5 6 7 0 1 0 1 2 1 0 1 )

( 0 1 2 3 4 5 6 7 2 1 2 1 0 1 2 1 )

R 4

( 0 1 2 3 4 5 6 7 0 1 0 1 2 1 2 1 )

( 0 1 2 3 4 5 6 7 2 1 2 1 0 1 0 1 )