a-a a-c aaa aac aan aao aap aar aax aay ac- aca acc acn aco acp acr acx acy an- ana anc ann ano anp anr anx any aoa aoc aon aoo aop aor aox ap- apa apc apn apo app apr apx apy ar- ara arc arn aro arp arr arx ary ax- axa axn axo axp axr axx ay- aya ayc ayn ayo ayp ayr ayx c-- caa cac can cao cap car cax cay cca ccc ccn cco ccp ccr ccx cn- cna cnc cnn cno cnp cnr cnx cny co- coa coc con coo cop cor cox coy cpa cpc cpn cpo cpp cpr cpx cra crc crn cro crp crr crx cry cxc cxo cxp cxr cxx cya cyc cyn cyo cyp cyr naa nac nan nao nap nar nax nay nca ncc ncn nco ncp ncr ncx nna nnc nnn nno nnp no- noa noc non noo nop nor nox noy npa npc npn npo npp npr nra nrc nrn nro nrp nrr nrx nry nxc nya nyc nyn nyo nyp nyx nyy oaa oac oan oao oap oar oax oc- oca occ ocn oco ocp ocr ocx on- ona onc onn ono onp onr onx ony oo- ooa ooc oon ooo oop oor oox op- opa opc opn opo opp opr opx opy or- ora orc orn oro orp orr orx ory ox- oxa oxc oxn oxo oxx oxy oya oyo p-p paa pac pan pao pap par pax pay pca pcc pcn pco pcp pcr pcx pn- pna pnc pnn pno pnp pnr pnx pny poa poc pon poo pop por pox poy ppa ppc ppn ppo ppp ppr ppx pra prc prn pro prp prr prx pry pxc pxr py- pya pyc pyn pyo pyr pyx ra- raa rac ran rao rap rar rax ray rca rcc rcn rco rcp rcr rcx rna rnc rnn rno rnp rnr rny roa roc ron roo rop ror rox roy rpa rpc rpn rpo rpp rpr rpx rra rrc rrn rrp rrr rxp rxr ry- rya ryc ryn ryo ryr ryy xaa xac xan xap xar xcp xcr xcx xna xnc xno xoa xoc xon xoo xop xor xox xpa xpc xpn xpo xpp xrc xrx xry xxo xxp xxx xxy xyp xyr xyy yaa yac yan yao yap yar yax yay yca ycc yco ycp ycy yna ynn ynp yny yoc yon yoo yop yor yox yoy ypa ypo yra yrc yrn yro yrp yxa yxy yyc yyy