C1111233131211111211113313331333133313232321333133313231131321221   >>    C111123313121111121111331333133313331323232133313331323113132122   <<    C1111233131211111211113313331333133313232321333133313231131321223   >>      C1111233131211111211113313331333133313232321333133313231131321222   >>