In reply to Koen Knapen.

I like it! SOLOS is an ambigram, too. If you modify the DATA step code for the rotational palindrome to read
TO = '.q.p.......lwuodb.s.n.mx.z012...9.86'; /* new values (including digits) */
(I have added '2' to the list of rotational digits), then you can add
22 02 2022
to the DATALINES block and the program confirms that 20022022 is an ambigram.