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http://huaeryiyang.blog.163.com/blog/static/20299702420124218476878/
"+": 1 - += (, ) 2 - : ... 29 - + = () 30 - . 31 - . + 32 - 33 - : 2 + ... 42 - : - 43 - : - + 44 - ( + )
", , , ": 1 - : 2 - . ... 14 - . 15 - : () 16 - . + 17 - 18 - ""...