C111123313331323113313331333133313121111133112121111331323223313231313232321   >>    C11112331333132311331333133313331312111113311212111133132322331323131323232   <<    C111123313331323113313331333133313121111133112121111331323223313231313232323   >>      C111123313331323113313331333133313121111133112121111331323223313231313232322   >>