C3123121111113313121111331333133313331333223313231333132213331121321   >>    C312312111111331312111133133313331333133322331323133313221333112132   <<    C3123121111113313121111331333133313331333223313231333132213331121323   >>      C3123121111113313121111331333133313331333223313231333132213331121322   >>