a-a a-q a-t aaa aap aaq aat aax aay ap- apa app apq apt apx apy aqa aqp aqt at- ata atp att atx ax- axa axp axt axx ay- aya ayp ayt ayx p-p paa pap paq pat pax pay ppa ppp ppq ppt ppx pqq pt- pta ptp ptq ptt ptx pty pxt py- pya pyt pyx qaa qap qat qax qpp qqq qta qtq qty t-x taa tap taq tat tax tay tpa tpp tpq tpt tpx tta ttp ttt ttx tty txt tya typ tyt xaa xap xat xpa xpp xpt xqt xtp xtx xty xxp xxx xxy xyp xyy yaa yap yat yax yay ypa yqt yta ytp ytt yxa yxy yyt yyy