a-a a-c aaa aac aan aao aar aau aax ac- aca acc acn aco acr acu acx an- ana anc ann ano anr anu anx aoa aoc aon aoo aor aou aox ar- ara arc arn aro arr aru arx au- aua auc aun auo aur aux ax- axa axn axo axr axx c-- caa cac can cao car cau cax cca ccc ccn cco ccr ccu ccx cn- cna cnc cnn cno cnr cnu cnx co- coa coc con coo cor cou cox cra crc crn cro crr cru crx cua cuc cun cuo cur cuu cxc cxo cxr cxx naa nac nan nao nar nau nax nca ncc ncn nco ncr ncu ncx nna nnc nnn nno nnu no- noa noc non noo nor nou nox nra nrc nrn nro nrr nru nrx nua nuc nun nuo nur nuu nux nxc oaa oac oan oao oar oau oax oc- oca occ ocn oco ocr ocu ocx on- ona onc onn ono onr onu onx oo- ooa ooc oon ooo oor oox or- ora orc orn oro orr oru orx ou- oua ouc oun ouo our ox- oxa oxc oxn oxo oxx ra- raa rac ran rao rar rau rax rca rcc rcn rco rcr rcu rcx rna rnc rnn rno rnr rnu roa roc ron roo ror rou rox rra rrc rrn rrr rru rua ruc run ruo rur ruu rux rxr ua- uaa uac uan uao uar uau uca ucc ucn uco ucr ucu un- una unc unn uno unr unu unx uoa uoc uon uoo uor uox ur- ura urc urn uro urr uru urx uua uuc uun uur uuu uxc uxo uxr uxu xaa xac xan xar xau xcr xcx xna xnc xno xnu xoa xoc xon xoo xor xox xrc xrx xun xxo xxx