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Input formatting choices (reversed digits, delimiters, etc.) as long as the format is fixed and doesn't encode the answer
，这一点在91视频中也有详细论述
动态的视觉律动：特有的视窗设计，让 CD 碟片旋转清晰可见，提供了一种数字屏幕无法替代的播放仪式感。
- self_check: string[]