C11112331312111112111133133313331333132313233313231323223323221   >>    C1111233131211111211113313331333133313231323331323132322332322   <<    C11112331312111112111133133313331333132313233313231323223323223   >>      C11112331312111112111133133313331333132313233313231323223323222   >>