C111123313121111121111331333133313331333112221211111133133313232112312321   >>    C11112331312111112111133133313331333133311222121111113313331323211231232   <<    C111123313121111121111331333133313331333112221211111133133313232112312323   >>      C111123313121111121111331333133313331333112221211111133133313232112312322   >>