C12313211232233312111111312111133133313331323133313331122332321133211222321   >>    C1231321123223331211111131211113313331333132313331333112233232113321122232   <<    C12313211232233312111111312111133133313331323133313331122332321133211222323   >>      C12313211232233312111111312111133133313331323133313331122332321133211222322   >>