cfhadgeb: valid
cfhaegbd: valid
cfhbdage: valid
cgbheadf: valid
cgbhfdae: valid
chdgafbe: valid
daehbgcf: valid
daehfcgb: valid
dbehfacg: valid
dbgcfhae: valid
dbgcfhea: valid
dbgeahfc: valid
dbhegacf: valid
dbhfaceg: valid
dfaebhcg: valid
dfhbgace: valid
dfhcageb: valid
dgahebfc: valid
dgchbeaf: valid
dgebfach: valid
dgecafhb: valid
dhacfbge: valid
dhaegbfc: valid
dhecagbf: valid
eadfhbgc: valid
eahdbgcf: valid
eahfcgbd: valid
ebdfhcag: valid
ebdgchfa: valid
abcdefgh: NOT valid
bcfghade: NOT valid
dabghcde: NOT valid
ahefbdcg: NOT valid
gacedbfh: NOT valid
cfabdghe: NOT valid
hacgbdfe: NOT valid