a-a a-b a-t aaa aab aak aap aat ab- aba abb abk abp abt aka akb akk akp ap- apa apb apk app apt at- ata atb atp att b-p baa bab bak bap bat bba bbb bbk bbp bbt bka bkb bkk bkp bkt bpa bpb bpp bpt bta btb btk btp btt k-t ka- kaa kab kak kap kat kba kbb kbk kbp kkb kkk kkp kkt kpa kpk kpp kpt kta ktb ktk ktp ktt p-p paa pab pak pap pat pba pbb pbk pbp pbt pka pkb pkp pkt ppa ppb ppk ppp ppt pt- pta ptb ptk ptp ptt taa tab tak tap tat tba tbb tbk tbp tbt tka tkb tkk tkp tkt tpa tpb tpk tpp tpt tta ttb ttk ttp ttt