a-a a-t aaa aag aao aap aat aax ag- aga agg ago agp agt agx aoa aog aoo aop aot aox ap- apa apg apo app apt apx at- ata atg ato atp att atx ax- axa axo axp axt axx g-p gaa gag gao gap gat gga ggg ggo ggp ggt goa gog goo gop got gox gpa gpg gpo gpp gpt gpx gta gtg gto gtp gtt gtx gxa gxp gxt oaa oag oao oap oat oax oga ogg ogo ogp ogt ogx oo- ooa oog ooo oop oot oox op- opa opg opo opp opt opx ot- ota otg oto otp ott ox- oxa oxo oxt oxx p-p paa pag pao pap pat pax pga pgg pgo pgp pgt poa pog poo pop pot pox ppa ppg ppo ppp ppt ppx pt- pta ptg pto ptp ptt ptx pxg pxt t-x taa tag tao tap tat tax tga tgg tgo tgp tgt to- toa tog too top tot tox tpa tpg tpo tpp tpt tpx tta ttg tto ttp ttt ttx txt xaa xag xap xat xgp xoa xog xoo xop xot xox xpa xpg xpo xpp xpt xtp xtx xxo xxp xxx