a-a a-t aaa aam aas aat aax ama amm ams amt amx as- asa asm ass ast asx at- ata atm ats att atx ax- axa axm axs axt axx maa mam mas mat max mma mmm mms mmt mmx msa msm mss mst msx mta mtm mts mtt mtx mxa mxs saa sam sas sat sax sma smm sms smt smx ss- ssa ssm sss sst ssx sta stm sts stt stx sxm sxs sxt t-x taa tam tas tat tax tma tmm tms tmt tmx tsa tsm tss tst tsx tta ttm tts ttt ttx txs txt xaa xam xas xat xma xmm xms xmt xmx xsa xsm xss xst xtm xts xtx xxx