C11112331312111112111133133313331333133313331333133313223313331323133313121321   >>    C1111233131211111211113313331333133313331333133313331322331333132313331312132   <<    C11112331312111112111133133313331333133313331333133313223313331323133313121323   >>      C11112331312111112111133133313331333133313331333133313223313331323133313121322   >>