ntt o-i oaa oab oac oad oae oai oam oan oao oas oat ob- oba obb obc obd obe obi obm obn obo obs obt oc- oca ocb occ ocd oci ocm ocn oco ocs oct oda odb odc odd ode odi odm odn odo ods odt oea oeb oec oed oee oei oem oen oeo oes oet oia oib oic oid oie oii oim oin oio ois oit om- oma omb omc omd ome omi omm omn omo oms omt on- ona onb onc ond one oni onn ono ons ont oo- ooa oob ooc ood ooi oom oon ooo oos oot os- osa osb osc osd ose osi osm osn oso oss ost ot- ota otb otc otd ote oti otm otn oto ots ott saa sab sac sad sae sai sam san sao sas sat sba sbb sbc sbd sbe sbi sbm sbn sbo sbs sbt sca scb scc scd sce sci scm scn sco scs sct sda sdb sdc sdd sde sdi sdm sdn sdo sds sdt se- sea seb sec sed see sei sem sen seo ses set sia sib sic sid sie sii sim sin sio sis sit sma smb smc smd sme smi smm smn smo sms smt sna snb snc snd sne sni snm snn sno sns snt soa sob soc sod soe soi som son soo sos sot ss- ssa ssb ssc ssd sse ssi ssm ssn sso sss sst sta stb stc std ste sti stm stn sto sts stt taa tab tac tad tae tai tam tan tao tas tat tba tbb tbc tbd tbe tbi tbm tbn tbo tbs tbt tca tcb tcc tcd tce tci tcm tcn tco tcs tct tda tdb tdc tdd tde tdi tdm tdn tdo tds tdt te- tea teb tec ted tee tei tem ten teo tes tet tia tib tic tid tie tii tim tin tio tis tit tma tmb tmc tmd tme tmi tmm tmn tmo tms tmt tna tnb tnc tnd tne tni tnm tnn tno tns tnt to- toa tob toc tod toe toi tom ton too tos tot tsa tsb tsc tsd tse tsi tsm tsn tso tss tst tta ttb ttc ttd tte tti ttm ttn tto tts ttt