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# regular expressions

How to use regular expressions to find such sequences of numbers in the text: "8 9 10" or "10 10 9" or "9 9 8" or "9 8 10"?

6 Answers

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Ok. So, to make sure, for the string
'four 3 8 10 six 9 10 8 8'
the correct output would be
'8 10', '9 10 8 8'
Is that correct? If so,
'((?:(?:8|9|10)\s)*(?:8|9|10))' appears to do the trick. Not extensively tested though.

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This can be done exactly as you said in the question.

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This is a short code for test of your input Mary_d9 with in your question mentioned requested sequences:
https://code.sololearn.com/W464rI07K52h/?ref=app

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Two questions: will there always be 3 numbers, or will the number vary, and what language are you using?

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Russ The text can contain different numbers and even dates, but I only need 8, 9 and 10. There is a space separator between them. I will execute the command with regex in bash.

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Russ thank you!