C11112331312111112111133133313331333132313233313331312111133133313231322132321   >>    C1111233131211111211113313331333133313231323331333131211113313331323132213232   <<    C11112331312111112111133133313331333132313233313331312111133133313231322132323   >>      C11112331312111112111133133313331333132313233313331312111133133313231322132322   >>