use warnings;
use strict;

while (<DATA>) {
    if (/[A-Z]/) {
        print 'good ';
    }
    else {
        print 'bad  ';
    }
    print;
}

__DATA__
*
*,*
*.*
ABC
ABC,DEF,GHI_JKL

##</code><code>##

bad  *
bad  *,*
bad  *.*
good ABC
good ABC,DEF,GHI_JKL