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    if ( $line =~ /\d{4,}/ { $date = $1; }
    
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    else { $seqs{$sequence} = "$date;$orig;$desg;$body"; }
    
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    [bluethundr@cc126-200:~/perl] $:./3par-test5.pl 
    Use of uninitialized value in pattern match (m//) at ./3par-test5.pl l
    +ine 29, <MYFILE> line 1.
    Use of uninitialized value in concatenation (.) or string at ./3par-te
    +st5.pl line 30, <MYFILE> line 1.
    Use of uninitialized value in concatenation (.) or string at ./3par-te
    +st5.pl line 30, <MYFILE> line 1.
    Use of uninitialized value in concatenation (.) or string at ./3par-te
    +st5.pl line 30, <MYFILE> line 1.
    Use of uninitialized value in concatenation (.) or string at ./3par-te
    +st5.pl line 30, <MYFILE> line 1.
    
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    while (<MYFILE>) {
        next if (m/^$/);
    ...
        if ( $line =~  /\d\d:\d\d:\d\d/g { $date = $1; }
        else { $seqs{$sequence} = "$date;$orig;$desg;$body"; }
    }