C1111233131211111211113313331333133313232321333133313331333131232322112121   >>    C111123313121111121111331333133313331323232133313331333133313123232211212   <<    C1111233131211111211113313331333133313232321333133313331333131232322112123   >>      C1111233131211111211113313331333133313232321333133313331333131232322112122   >>