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  1. or download this
    record  : account address info
account : /trusty regex here/
address : ...
info    : ...
  2. or download this
    account : /\d(\d){0,19} {19 - length \1}/
  3. or download this
     01234567890123456789
'123                 ' # OK
'123 123             ' # NOK
'                    ' # NOK
'123c                ' # NOK