pat = " /^ [a-z0-9！#

pat = "/^[a-z0-9!#

％& * +-=?^ _`{|}〜] +(\.[a -z0-9！#

%&*+-=?^_`{|}~]+(\.[a-z0-9!#

％& * +-=?^ _`{|}〜] +)*";

%&*+-=?^_`{|}~]+)*";