User ID should be 3~20 letters long and consist of alphabet+number with alphabet as first letter.
Password should be 6~20 letters long
Name should be 2~20 letters long
Nickname should be 2~20 letters long
Email address will be used to modify/find password after email verification
Please input if you have your websites
Please input if you have your blogs
Please input your birth date
If you don't join mailing, you will not able to receive group mail
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