oit okb okc okd oke okg oki okk oko oks on- onb onc ond one ong oni onk onn ono ons ont oo- oob ooc ood oog ooi ook oon ooo oos oot os- osb osc osd ose osg osi osk osn oso oss ost ot- otb otc otd ote otg oti otk otn oto ots ott sbb sbc sbd sbe sbg sbi sbk sbn sbo sbs sbt scb scc scd sce scg sci sck scn sco scs sct sdb sdc sdd sde sdg sdi sdk sdn sdo sds sdt se- seb sec sed see seg sei sek sen seo ses set sgb sgc sgd sge sgg sgi sgk sgn sgo sgs sgt sib sic sid sie sig sii sik sin sio sis sit sk- skb skc skd ske skg ski skk sko sks skt snb snc snd sne sng sni snk snn sno sns snt sob soc sod soe sog soi sok son soo sos sot ss- ssb ssc ssd sse ssg ssi ssk ssn sso sss sst stb stc std ste stg sti stk stn sto sts stt tbb tbc tbd tbe tbg tbi tbk tbn tbo tbs tbt tcb tcc tcd tce tcg tci tck tcn tco tcs tct tdb tdc tdd tde tdg tdi tdk tdn tdo tds tdt te- teb tec ted tee teg tei tek ten teo tes tet tgb tgc tge tgg tgi tgk tgn tgo tgs tgt tib tic tid tie tig tii tik tin tio tis tit tkb tkc tke tkg tkk tko tks tkt tnb tnc tnd tne tng tni tnk tnn tno tns tnt to- tob toc tod toe tog toi tok ton too tos tot tsb tsc tsd tse tsg tsi tsk tsn tso tss tst ttb ttc ttd tte ttg tti ttk ttn tto tts ttt