C11112331312111112111133132313331333133313232212111133132211233132231311   >>    C1111233131211111211113313231333133313331323221211113313221123313223131   <<    C11112331312111112111133132313331333133313232212111133132211233132231313   >>      C11112331312111112111133132313331333133313232212111133132211233132231312   >>