In case anyone is curious:
The eleventh domain in the list, aͦ .com, parses as U+0061 U+0366, or LATIN SMALL LETTER A, COMBINING LATIN SMALL LETTER O. As far as I can tell, this is IDNA2008 compliant. The character (actually, two unicode characters) is mentioned in this document:
Characters Used in the Collection of Swiss Law Sources, which is a proposal submitted to the Medieval Unicode Font Initiative (mufi.info).
Punycode is xn--a-phb.com.
Welcome to the forum, idn2012.
Avtal