npo npp npr nps npt nra nrb nrc nre nri nrl nrn nro nrp nrr nrs nrt nsa nsb nsc nse nsi nsl nsn nso nsp nsr nss nst nta ntb ntc nte nti ntn nto ntp ntr nts ntt o-i oaa oab oac oae oai oal oan oao oap oar oas oat ob- oba obb obc obe obi obl obn obo obp obr obs obt oc- oca ocb occ oci ocl ocn oco ocp ocr ocs oct oea oeb oec oee oei oel oen oeo oep oer oes oet oia oib oic oie oii oil oin oio oip oir ois oit ola olb olc ole oli oll oln olo olp ols olt on- ona onb onc one oni onl onn ono onp onr ons ont oo- ooa oob ooc ooi ool oon ooo oop oor oos oot op- opa opb opc ope opi opl opn opo opp opr ops opt or- ora orb orc ore ori orl orn oro orp orr ors ort os- osa osb osc ose osi osl osn oso osp osr oss ost ot- ota otb otc ote oti otl otn oto otp otr ots ott p-p paa pab pac pae pai pal pan pao pap par pas pat pba pbb pbc pbe pbi pbl pbn pbo pbp pbr pbs pbt pca pcb pcc pce pci pcl pcn pco pcp pcr pcs pct pea peb pec pee pei pel pen peo pep per pes pet pia pib pic pie pii pil pin pio pip pir pis pit pla plb plc ple pli pll pln plo plp plr pls plt pn- pna pnb pnc pne pni pnl pnn pno pnp pnr pns pnt poa pob poc poe poi pol pon poo pop por pos pot ppa ppb ppc ppe ppi ppl ppn ppo ppp ppr pps ppt pra prb prc pre pri prl prn pro prp prr prs prt ps- psa psb psc pse psi psl psn pso psp psr pss pst pt- pta ptb ptc pte pti ptl ptn pto ptp ptr pts ptt ra- raa rab rac rae rai ral ran rao rap rar ras rat rba rbb rbc rbe rbi rbl rbn rbo rbp rbr rbs rbt rca rcb rcc rce rci rcl rcn rco rcp rcr rcs rct re- rea reb rec ree rei rel ren reo rep rer res ret ria rib ric rie rii ril rin rio rip rir ris rit rla rlc rle rli rll rln rlo rlp rlr rls rlt rna rnb rnc rni rnn rno rnp rnr rns rnt roa rob roc roe roi rol ron roo rop ror ros rot rpa rpb rpc rpe rpi rpl rpn rpo rpp rpr rps rpt rra rrb rrc rri rrl rrn rrp rrr rrs rrt rsa rsb rsc rse rsi rsl rsn rso rsp rsr rss rst rta rtb rtc rte rti rtl rtn rto rtp rtr rts rtt saa sab sac sae sai sal san sao sap sar sas sat sba sbb sbc sbe sbi sbl sbn sbo sbp sbr sbs sbt sca scb scc sce sci scl scn sco scp scr scs sct se- sea seb sec see sei sel sen seo sep ser ses set sia sib sic sie sii sil sin sio sip sir sis sit sla slb slc sle sli sll sln slo slp slr sls slt sna snb snc sne sni snl snn sno snp snr sns snt soa sob soc soe soi sol son soo sop sor sos sot spa spb spc spe spi spl spn spo spp spr sps spt sr- sra srb src sre sri srl srn sro srp srr srs srt ss- ssa ssb ssc sse ssi ssl ssn sso ssp ssr sss sst sta stb stc ste sti stl stn sto stp str sts stt taa tab tac tae tai tal tan tao tap tar tas tat tba tbb tbc tbe tbi tbl tbn tbo tbp tbr tbs tbt tca tcb tcc tce tci tcl tcn tco tcp tcr tcs tct te- tea teb tec tee tei tel ten teo tep ter tes tet tia tib tic tie tii til tin tio tip tir tis tit tla tlc tle tli tll tln tlo tlp tlr tls tlt tna tnb tnc tne tni tnl tnn tno tnp tnr tns tnt to- toa tob toc toe toi tol ton too top tor tos tot tpa tpb tpc tpe tpi tpl tpn tpo tpp tpr tps tpt tra trb trc tre tri trl trn tro trp trr trs trt tsa tsb tsc tse tsi tsl tsn tso tsp tsr tss tst tta ttb ttc tte tti ttl ttn tto ttp ttr tts ttt