除非特别标注，所有的版权归其各自的作者。
All Copyrights are held by their by their respective owners, unless specifically noted otherwise.
如无特别标注，词曲作者都是斯蒂芬·桑德海姆。
Unless otherwise noted, music and lyrics by Stephen Sondheim.
有特别标注的代码能够表示模式中的条件性及程序性的单元。
Conditional and procedural elements in the pattern are expressed with code in special callouts.
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