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  1. stringnum = '0007001369920090687073'
  2. result = stringnum[/(?<=000)\d{9}/]
  3. puts result
Success #stdin #stdout 0.01s 6204KB
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700136992
https://ideone.com/qNa2l7
language:
Ruby (ruby 2.5.5)
created:
3 years ago
visibility:
secret

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