C1111233131211111211113313331333133313232321333133313331333131232322211   >>    C111123313121111121111331333133313331323232133313331333133313123232221   <<    C1111233131211111211113313331333133313232321333133313331333131232322213   >>      C1111233131211111211113313331333133313232321333133313331333131232322212   >>