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  1. #!/bin/bash
  2. s='1 Cov2,
  3. 2 CoV-2, 
  4. 3 COVID-2, 
  5. 4 COVID19, 
  6. 5 COVID-19, 
  7. 6 COVID 19, etc'
  8. grep -i -E "COV.{0,3}(2|19)" <<< "$s"
Success #stdin #stdout 0s 4448KB
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stdin
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Standard input is empty
stdout
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1 Cov2,
2 CoV-2, 
3 COVID-2, 
4 COVID19, 
5 COVID-19, 
6 COVID 19, etc
https://ideone.com/qZfpVr
language:
Bash (bash 5.0.3)
created:
6 years ago
visibility:
secret

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