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    It's not clear what the significance or pattern is with the word tech. Why not just hard code it? How do you know it's the word you are looking for? Commented Jan 7, 2017 at 7:04
  • word <tech> is a example. Suppose word <apache>. actually word is not a pattern. it is exactly a word Commented Jan 7, 2017 at 7:37
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    (1) That comment is as clear as mud. Please explain better. (2) Please explain where the 0.x in the seventh line comes from. Commented Jan 7, 2017 at 7:48
  • What about one two there tech *sample bla bla ? There's tech but no number. What should be done in that case ? Commented Jan 7, 2017 at 8:13
  • sorry you are right. Commented Jan 7, 2017 at 8:17