record  : account address info
account : /trusty regex here/
address : ...
info    : ...

##</code><code>##

account : /\d(\d){0,19} {19 - length \1}/

##</code><code>##

 01234567890123456789
'123                 ' # OK
'123 123             ' # NOK
'                    ' # NOK
'123c                ' # NOK