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 )