a-a a-c a-z aaa aac aan aar aau aaz ac- aca acc acn acr acu acz an- ana anc ann anr anu anz ar- ara arc arn arr aru arz au- aua auc aun aur auz az- aza azn azu azz c-- caa cac can car cau caz cca ccc ccn ccr ccu ccz cn- cna cnc cnn cnr cnu cra crc crn crr cru crz cua cuc cun cur cuu cuz cz- czc naa nac nan nar nau naz nca ncc ncn ncr ncu nna nnc nnn nnu nnz nra nrc nrn nrr nru nrz nua nuc nun nur nuu nzz ra- raa rac ran rar rau raz rca rcc rcn rcr rcu rna rnc rnn rnr rnu rnz rra rrc rrn rrr rru rua ruc run rur ruu ruz rza ua- uaa uac uan uar uau uaz uca ucc ucn ucr ucu un- una unc unn unr unu ur- ura urc urn urr uru urz uua uuc uun uur uuu uza uzu zaa zac zan zar zaz znc znn zuc zun zur zuz zzr zzz