my %spec = (
    username => qr#^[A-Za-z][-.\w]{2,29}$#,
    domain => qr#^(a|c|f|h|ho|i|k|o|s|x)\.com$#,
    email => qr#^[\w\.\-]+\@(?:[a-z\d\-]+\.)+[a-z\d]+$#i,
    service => qr#^Yes|No$#,
    conditions => qr#^Yes$#,
);