[a-z0-9!#$%&'*+/=?^_`{|}~-]
[a-z0-9!#$%&'*+/=?^_`{|}~-]
[a-z0-9]
[a-z0-9]
[a-z0-9-]
[a-z0-9-]
[32_6]
[32_6]