a-a a-c a-q a-t aaa aac aao aaq aar aat ac- aca acc aco acq acr act aoa aoc aoo aor aot aqa aqc aqo aqr aqt ar- ara arc aro arq arr art at- ata atc ato atr att c-- caa cac cao caq car cat cca ccc cco ccr cct co- coa coc coo coq cor cot cqa cqc cqo cqt cra crc cro crq crr crt cta ctc cto ctq ctr ctt oaa oac oao oaq oar oat oc- oca occ oco ocr oct oo- ooa ooc ooo oor oot oqo or- ora orc oro orr ort ot- ota otc oto otr ott qaa qac qar qat qca qcc qco qct qoo qor qqq qra qrc qrt qta qtc qto qtq qtr ra- raa rac rao raq rar rat rca rcc rco rcr rct roa roc roo ror rot rqc rra rrc rrq rrr rrt rta rtc rto rtq rtr rtt taa tac tao taq tar tat tca tcc tco tcr tct to- toa toc too toq tor tot tqo tra trc tro trq trr trt tta ttc tto ttr ttt