C312312111111331312111133133313231333131133132231333133313331323221231221   >>    C31231211111133131211113313331323133313113313223133313331333132322123122   <<    C312312111111331312111133133313231333131133132231333133313331323221231223   >>      C312312111111331312111133133313231333131133132231333133313331323221231222   >>