C11112331312111112111133133313231333132313232233133313233311312321   >>    C1111233131211111211113313331323133313231323223313331323331131232   <<    C11112331312111112111133133313231333132313232233133313233311312323   >>      C11112331312111112111133133313231333132313232233133313233311312322   >>