文件名称:uva-333
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输入一串字符串（首尾允许有空格，长度小于等于80），判断其是否为Good ISBN，并按要求输出
ISBN(国际标准书号)：通常是由10个数字(0,1…9)组成，但第十位可能为X(代表数字10)，数字之间会有连字符（即‘-’)
-Enter the string of a string (both spaces are allowed, length less than or equal 80), to determine whether it is Good ISBN, as required output ISBN (International Standard Book Number): usually by 10 digits (0,1 ... 9) composition, but may be the tenth X (representing the number 10), there will be a hyphen between the numbers (ie, ' -' )
ISBN(国际标准书号)：通常是由10个数字(0,1…9)组成，但第十位可能为X(代表数字10)，数字之间会有连字符（即‘-’)
-Enter the string of a string (both spaces are allowed, length less than or equal 80), to determine whether it is Good ISBN, as required output ISBN (International Standard Book Number): usually by 10 digits (0,1 ... 9) composition, but may be the tenth X (representing the number 10), there will be a hyphen between the numbers (ie, ' -' )
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uva 333.doc