nrb nre nri nrl nrm nrn nro nrp nrr nrs nrt nsa nsb nse nsi nsl nsm nsn nso nsp nsr nss nst nta ntb nte nti ntm ntn nto ntp ntr nts ntt o-i oaa oab oae oai oal oam oan oao oap oar oas oat ob- oba obb obe obi obl obm obn obo obp obr obs obt oea oeb oee oei oel oem oen oeo oep oer oes oet oia oib oie oii oil oim oin oio oip oir ois oit ola olb ole oli oll olm oln olo olp ols olt om- oma omb ome omi oml omm omn omo omp omr oms omt on- ona onb one oni onl onn ono onp onr ons ont oo- ooa oob ooi ool oom oon ooo oop oor oos oot op- opa opb ope opi opl opm opn opo opp opr ops opt or- ora orb ore ori orl orm orn oro orp orr ors ort os- osa osb ose osi osl osm osn oso osp osr oss ost ot- ota otb ote oti otl otm otn oto otp otr ots ott p-p paa pab pae pai pal pam pan pao pap par pas pat pba pbb pbe pbi pbl pbm pbn pbo pbp pbr pbs pbt pea peb pee pei pel pem pen peo pep per pes pet pia pib pie pii pil pim pin pio pip pir pis pit pla plb ple pli pll plm pln plo plp plr pls plt pma pmb pme pmi pml pmm pmn pmo pmp pmr pms pmt pn- pna pnb pne pni pnl pnm pnn pno pnp pnr pns pnt poa pob poe poi pol pom pon poo pop por pos pot ppa ppb ppe ppi ppl ppm ppn ppo ppp ppr pps ppt pra prb pre pri prl prm prn pro prp prr prs prt ps- psa psb pse psi psl psm psn pso psp psr pss pst pt- pta ptb pte pti ptl ptm ptn pto ptp ptr pts ptt ra- raa rab rae rai ral ram ran rao rap rar ras rat rba rbb rbe rbi rbl rbm rbn rbo rbp rbr rbs rbt re- rea reb ree rei rel rem ren reo rep rer res ret ria rib rie rii ril rim rin rio rip rir ris rit rla rle rli rll rlm rln rlo rlp rlr rls rlt rma rmb rme rmi rml rmm rmn rmo rmp rmr rms rmt rna rnb rni rnm rnn rno rnp rnr rns rnt roa rob roe roi rol rom ron roo rop ror ros rot rpa rpb rpe rpi rpl rpm rpn rpo rpp rpr rps rpt rra rrb rri rrl rrm rrn rrp rrr rrs rrt rsa rsb rse rsi rsl rsm rsn rso rsp rsr rss rst rta rtb rte rti rtl rtm rtn rto rtp rtr rts rtt saa sab sae sai sal sam san sao sap sar sas sat sba sbb sbe sbi sbl sbm sbn sbo sbp sbr sbs sbt se- sea seb see sei sel sem sen seo sep ser ses set sia sib sie sii sil sim sin sio sip sir sis sit sla slb sle sli sll slm sln slo slp slr sls slt sma smb sme smi sml smm smn smo smp smr sms smt sna snb sne sni snl snm snn sno snp snr sns snt soa sob soe soi sol som son soo sop sor sos sot spa spb spe spi spl spm spn spo spp spr sps spt sr- sra srb sre sri srl srm srn sro srp srr srs srt ss- ssa ssb sse ssi ssl ssm ssn sso ssp ssr sss sst sta stb ste sti stl stm stn sto stp str sts stt taa tab tae tai tal tam tan tao tap tar tas tat tba tbb tbe tbi tbl tbm tbn tbo tbp tbr tbs tbt te- tea teb tee tei tel tem ten teo tep ter tes tet tia tib tie tii til tim tin tio tip tir tis tit tla tle tli tll tlm tln tlo tlp tlr tls tlt tma tmb tme tmi tml tmm tmn tmo tmp tmr tms tmt tna tnb tne tni tnl tnm tnn tno tnp tnr tns tnt to- toa tob toe toi tol tom ton too top tor tos tot tpa tpb tpe tpi tpl tpm tpn tpo tpp tpr tps tpt tra trb tre tri trl trm trn tro trp trr trs trt tsa tsb tse tsi tsl tsm tsn tso tsp tsr tss tst tta ttb tte tti ttl ttm ttn tto ttp ttr tts ttt