也不一定非要转换,除去不可见字符也没多少个- set str="!^#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~€‚ƒ„…†‡ˆ‰Š‹ŒŽ‘’“”•–—˜™š›œžŸ ¡¢£¤¥|§¨©a«¬-®ˉ°±23′μ¶·¸1o»¼½¾¿àáÂÃÄÅÆÇèéêËìíÎÏDÑòóÔÕÖרùúÛüYTßàáaãäåæçèéêëìíîïeñòóôõö÷øùúûüytÿ"
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