BEGIN { FS="[ \\[]" }
{ if ( gensub("-","","g",$1) < gensub("-","","g",$7) ) { $7 = $1 }
$7 = "[" $7
print
}
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MjAxMi0wMS0zMCAxMjo0MTowNiwyMTQgYXBwMTAgZGV2aWNlIElORk8gWzIwMTMtMDEtMzAgMTI6NDA6NDYsMjE0XSBpbmZvMSBpbmZvMiBpbmZvMyAuLi4KMjAxMi0wMS0zMCAxMjo0MTowNiwyMTQgYXBwMTAgZGV2aWNlIElORk8gWzIwMTEtMDEtMzAgMTI6NDA6NDYsMjE0XSBpbmZvMSBpbmZvMiBpbmZvMyAuLi4=
2012-01-30 12:41:06,214 app10 device INFO [2013-01-30 12:40:46,214] info1 info2 info3 ...
2012-01-30 12:41:06,214 app10 device INFO [2011-01-30 12:40:46,214] info1 info2 info3 ...