C1111233131211111211113313331333133313232321333133313331312212111133131233131   >>    C111123313121111121111331333133313331323232133313331333131221211113313123313   <<    C1111233131211111211113313331333133313232321333133313331312212111133131233133   >>      C1111233131211111211113313331333133313232321333133313331312212111133131233132   >>