mrl mrm mrn mro mrp mrr mrs msa msb msc mse msh msl msm msn mso msp msr mss naa nab nac nae nah nal nam nan nao nap nar nas nba nbb nbc nbe nbl nbm nbn nbo nbp nbr nbs nca ncb ncc nce nch ncl ncm ncn nco ncp ncr ncs ne- nea neb nec nee neh nel nem nen neo nep ner nes nha nhb nhc nhe nhh nhl nhm nhn nhp nhr nhs nla nlb nlc nle nlh nll nlm nln nlo nlp nlr nls nma nmb nmc nme nmh nml nmm nmn nmo nmp nmr nms nna nnb nnc nne nnh nnl nnm nnn nno nnp nns no- noa nob noc noe noh nol nom non noo nop nor nos npa npb npc npe nph npl npm npn npo npp npr nps nra nrb nrc nre nrl nrm nrn nro nrp nrr nrs nsa nsb nsc nse nsh nsl nsm nsn nso nsp nsr nss oaa oab oac oae oah oal oam oan oao oap oar oas ob- oba obb obc obe obh obl obm obn obo obp obr obs oc- oca ocb occ och ocl ocm ocn oco ocp ocr ocs oea oeb oec oee oeh oel oem oen oeo oep oer oes oha ohc ohe ohh ohl ohm ohn oho ohp ohr ohs ola olb olc ole oll olm oln olo olp ols om- oma omb omc ome omh oml omm omn omo omp omr oms on- ona onb onc one onh onl onn ono onp onr ons oo- ooa oob ooc ooh ool oom oon ooo oop oor oos op- opa opb opc ope oph opl opm opn opo opp opr ops or- ora orb orc ore orh orl orm orn oro orp orr ors os- osa osb osc ose osh osl osm osn oso osp osr oss p-p paa pab pac pae pah pal pam pan pao pap par pas pba pbb pbc pbe pbl pbm pbn pbo pbp pbr pbs pca pcb pcc pce pch pcl pcm pcn pco pcp pcr pcs pea peb pec pee peh pel pem pen peo pep per pes pha phb phc phe phl phm phn pho php phr phs pla plb plc ple plh pll plm pln plo plp plr pls pma pmb pmc pme pmh pml pmm pmn pmo pmp pmr pms pn- pna pnb pnc pne pnh pnl pnm pnn pno pnp pnr pns poa pob poc poe poh pol pom pon poo pop por pos ppa ppb ppc ppe pph ppl ppm ppn ppo ppp ppr pps pra prb prc pre prh prl prm prn pro prp prr prs ps- psa psb psc pse psh psl psm psn pso psp psr pss ra- raa rab rac rae rah ral ram ran rao rap rar ras rba rbb rbc rbe rbh rbl rbm rbn rbo rbp rbr rbs rca rcb rcc rce rch rcl rcm rcn rco rcp rcr rcs re- rea reb rec ree reh rel rem ren reo rep rer res rh- rha rhb rhc rhe rhh rhl rhm rhn rho rhp rhr rhs rla rlc rle rlh rll rlm rln rlo rlp rlr rls rma rmb rmc rme rmh rml rmm rmn rmo rmp rmr rms rna rnb rnc rnh rnm rnn rno rnp rnr rns roa rob roc roe roh rol rom ron roo rop ror ros rpa rpb rpc rpe rph rpl rpm rpn rpo rpp rpr rps rra rrb rrc rrh rrl rrm rrn rrp rrr rrs rsa rsb rsc rse rsh rsl rsm rsn rso rsp rsr rss saa sab sac sae sah sal sam san sao sap sar sas sba sbb sbc sbe sbh sbl sbm sbn sbo sbp sbr sbs sca scb scc sce sch scl scm scn sco scp scr scs se- sea seb sec see seh sel sem sen seo sep ser ses sh- sha shb shc she shh shl shm shn sho shp shr shs sla slb slc sle slh sll slm sln slo slp slr sls sma smb smc sme smh sml smm smn smo smp smr sms sna snb snc sne snl snm snn sno snp snr sns soa sob soc soe soh sol som son soo sop sor sos spa spb spc spe sph spl spm spn spo spp spr sps sr- sra srb src sre srh srl srm srn sro srp srr srs ss- ssa ssb ssc sse ssh ssl ssm ssn sso ssp ssr sss