Input string:
[Wsg-Fs]-A-A-A-Cgbs-Sg7-[Wwg+s-Fs]-A-A-Afk-Cgbs-Sg7
[Wsg-Fs]-A-A-A-Cgbs-Sg7-[Wwg+s-
阅读背景：
Regex for matching a character, but not when it's enclosed in square bracket
来源：互联网
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