a-a a-b a-c a-t aaa aab aac aae aak aam aap aat ab- aba abb abc abe abk abm abp abt ac- aca acb acc ace ack acm acp act aea aeb aec aee aek aem aep aet aka akb akc ake akk akm akp ama amb amc ame amk amm amp amt ap- apa apb apc ape apk apm app apt at- ata atb atc ate atm atp att b-p baa bab bac bae bak bam bap bat bba bbb bbc bbe bbk bbm bbp bbt bca bcb bcc bce bck bcm bcp bct be- bea beb bec bee bek bem bep bet bka bkb bkc bke bkk bkm bkp bkt bma bmb bmc bme bmk bmm bmp bmt bpa bpb bpc bpe bpm bpp bpt bta btb btc bte btk btm btp btt c-- caa cab cac cae cak cam cap cat cba cbb cbc cbe cbk cbm cbp cbt cca ccb ccc cce cck ccm ccp cct ce- cea ceb cec cee cek cem cep cet cka ckb ckc ckm ckt cma cmb cmc cme cmk cmm cmp cmt cpa cpb cpc cpe cpk cpm cpp cpt cta ctb ctc cte ctk ctm ctp ctt eaa eab eac eae eak eam eap eat eba ebb ebc ebe ebk ebm ebp ebt ec- eca ecb ecc ece eck ecm ect eea eeb eec eee eek eem eep eet eka ekb ekc eke ekp ekt em- ema emb emc eme emk emm emp emt ep- epa epb epc epe epm epp ept eta etb etc ete etk etm etp ett k-t ka- kaa kab kac kae kak kam kap kat kba kbb kbc kbe kbk kbm kbp kca kcb kcc kce kck kcm kcp kct ke- kea keb kec kee kek kem kep ket kkb kkc kke kkk kkm kkp kkt kma kmb kmc kme kmk kmm kmp kmt kpa kpc kpe kpk kpm kpp kpt kta ktb ktc kte ktk ktm ktp ktt maa mab mac mae mak mam map mat mba mbb mbc mbe mbk mbm mbp mbt mc- mca mcb mcc mce mck mcm mcp mct mea meb mec mee mek mem mep met mka mkb mkc mke mkk mkm mkp mkt mma mmb mmc mme mmk mmm mmp mmt mpa mpb mpc mpe mpk mpm mpp mpt mta mtb mtc mte mtk mtm mtp mtt p-p paa pab pac pae pak pam pap pat pba pbb pbc pbe pbk pbm pbp pbt pca pcb pcc pce pck pcm pcp pct pea peb pec pee pek pem pep pet pka pkb pkc pke pkm pkp pkt pma pmb pmc pme pmk pmm pmp pmt ppa ppb ppc ppe ppk ppm ppp ppt pt- pta ptb ptc pte ptk ptm ptp ptt taa tab tac tae tak tam tap tat tba tbb tbc tbe tbk tbm tbp tbt tca tcb tcc tce tck tcm tcp tct te- tea teb tec tee tek tem tep tet tka tkb tkc tke tkk tkm tkp tkt tma tmb tmc tme tmk tmm tmp tmt tpa tpb tpc tpe tpk tpm tpp tpt tta ttb ttc tte ttk ttm ttp ttt