a-a a-c aaa aac aam aan aao aap aar aax ac- aca acc acm acn aco acp acr acx ama amc amm amn amo amp amr amx an- ana anc anm ann ano anp anr anx aoa aoc aom aon aoo aop aor aox ap- apa apc apm apn apo app apr apx ar- ara arc arm arn aro arp arr arx ax- axa axm axn axo axp axr axx c-- caa cac cam can cao cap car cax cca ccc ccm ccn cco ccp ccr ccx cma cmc cmm cmn cmo cmp cmr cmx cn- cna cnc cnm cnn cno cnp cnr cnx co- coa coc com con coo cop cor cox cpa cpc cpm cpn cpo cpp cpr cpx cra crc crm crn cro crp crr crx cxc cxo cxp cxr cxx m-o m-r maa mac mam man mao map mar max mc- mca mcc mcm mcn mco mcp mcr mcx mma mmc mmm mmn mmo mmp mmr mmx mna mnc mnm mnn mno mnp mnr moa moc mom mon moo mop mor mox mpa mpc mpm mpn mpo mpp mpr mpx mra mrc mrm mrn mro mrp mrr mrx mxa mxc mxn mxp mxr naa nac nam nan nao nap nar nax nca ncc ncm ncn nco ncp ncr ncx nma nmc nmm nmn nmo nmp nmr nna nnc nnm nnn nno nnp no- noa noc nom non noo nop nor nox npa npc npm npn npo npp npr nra nrc nrm nrn nro nrp nrr nrx nxc oaa oac oam oan oao oap oar oax oc- oca occ ocm ocn oco ocp ocr ocx om- oma omc omm omn omo omp omr omx on- ona onc onn ono onp onr onx oo- ooa ooc oom oon ooo oop oor oox op- opa opc opm opn opo opp opr opx or- ora orc orm orn oro orp orr orx ox- oxa oxc oxn oxo oxx p-p paa pac pam pan pao pap par pax pca pcc pcm pcn pco pcp pcr pcx pma pmc pmm pmn pmo pmp pmr pmx pn- pna pnc pnm pnn pno pnp pnr pnx poa poc pom pon poo pop por pox ppa ppc ppm ppn ppo ppp ppr ppx pra prc prm prn pro prp prr prx pxc pxm pxr ra- raa rac ram ran rao rap rar rax rca rcc rcm rcn rco rcp rcr rcx rma rmc rmm rmn rmo rmp rmr rmx rna rnc rnm rnn rno rnp rnr roa roc rom ron roo rop ror rox rpa rpc rpm rpn rpo rpp rpr rpx rra rrc rrm rrn rrp rrr rxp rxr xaa xac xam xan xap xar xcp xcr xcx xma xmc xmm xmo xmp xmr xmx xna xnc xno xoa xoc xom xon xoo xop xor xox xpa xpc xpm xpn xpo xpp xrc xrx xxo xxp xxx