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  1. #!/bin/bash
  2. grep -P '((.)\2.*){3}' <<< "Mississippi"
Success #stdin #stdout 0.01s 5304KB
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stdin
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Standard input is empty
stdout
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Mississippi
https://ideone.com/3J67Lk
language:
Bash (bash 5.0.3)
created:
2 years ago
visibility:
secret

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