a-a a-c aaa aac aad aak aan aao aar aau ac- aca acc acd ack acn aco acr acu ad- ada adc add adk adn ado adr adu aka akc akd akk akn ako akr aku an- ana anc and ank ann ano anr anu aoa aoc aod aok aon aoo aor aou ar- ara arc ard ark arn aro arr aru au- aua auc aud auk aun auo aur c-- caa cac cad cak can cao car cau cca ccc ccd cck ccn cco ccr ccu cda cdc cdd cdk cdn cdo cdr cdu cka ckc ckd cko cn- cna cnc cnd cnn cno cnr cnu co- coa coc cod cok con coo cor cou cra crc crd crk crn cro crr cru cua cuc cud cuk cun cuo cur cuu daa dac dad dak dan dao dar dau dca dcc dcd dck dcn dco dcr dcu dda ddc ddd ddk ddn ddo ddr ddu dka dkc dkk dko dkr dku dna dnc dnd dnk dnn dno dnr doa doc dod dok don doo dor dou dra drc drd drk drn dro drr dru dua duc dud duk dun duo dur ka- kaa kac kad kak kan kao kar kau kca kcc kcd kck kcn kcr kcu kda kdc kdk kdo kdr kdu kkc kkk kkn kkr kku kn- kna knc knd knk knn kno knr knu koa koc kod kok kon koo kor kou kra krc krd krk krn kro krr kru kuc kud kuk kun kur kuu naa nac nad nak nan nao nar nau nca ncc ncd nck ncn nco ncr ncu nda ndc ndd ndk ndn ndo ndr ndu nka nkc nkk nkn nko nkr nku nna nnc nnk nnn nno nnu no- noa noc nod nok non noo nor nou nra nrc nrd nrk nrn nro nrr nru nua nuc nud nuk nun nuo nur nuu oaa oac oad oak oan oao oar oau oc- oca occ ocd ock ocn oco ocr ocu oda odc odd odn odo odr odu oka okc okd okk oko okr oku on- ona onc ond onk onn ono onr onu oo- ooa ooc ood ook oon ooo oor or- ora orc ord ork orn oro orr oru ou- oua ouc oud ouk oun ouo our ra- raa rac rad rak ran rao rar rau rca rcc rcd rcn rco rcr rcu rda rdc rdd rdn rdo rdr rdu rkc rkk rko rku rna rnc rnd rnn rno rnr rnu roa roc rod rok ron roo ror rou rra rrc rrd rrk rrn rrr rru rua ruc rud ruk run ruo rur ruu ua- uaa uac uad uak uan uao uar uau uca ucc ucd uck ucn uco ucr ucu uda udc udd udk udn udo udr udu uka ukc ukk ukn ukr uku un- una unc und unk unn uno unr unu uoa uoc uod uok uon uoo uor ur- ura urc urd urk urn uro urr uru uua uuc uun uur uuu