C3123121111113313121111331333132313331333131123313232233132211211   >>    C312312111111331312111133133313231333133313112331323223313221121   <<    C3123121111113313121111331333132313331333131123313232233132211213   >>      C3123121111113313121111331333132313331333131123313232233132211212   >>