This is a test script hello.
This is hello a test script.
This hello is a test script hello.
This is a test script hello.
hello This is a test script hello.
This is a test script hello.
This is hello a te
阅读背景：
如何将以下linux文件中的hello替换为hello1，并将hello的下一个问题替换为hello2，依此类推，直至文件末尾
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