BAC
ACAB
ZYXCBA
*** No Successor ***
*** No Successor ***
AAAABA
*** No Successor ***
BBAAAA
*** No Successor ***
ABCDEFGHIJKLMNOPQRSTUVWXYZABCDFE
*** No Successor ***
ZAAAAAAAAAAAAAAAAAAAAAAAAAAAAAZA
ZAAAAAAAAAAAAAAAAAAAAAAAAAAAAZAA
ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZA
*** No Successor ***