a-a a-b a-i a-t aaa aab aae aaf aai aak aap aat ab- aba abb abe abf abi abk abp abt aea aeb aee aef aei aek aep aet af- afa afb afe aff afi afk afp aft ai- aia aib aie aif aii aik aip ait aka akb ake aki akk akp ap- apa apb ape apf api apk app apt at- ata atb ate atf ati atp att b-p baa bab bae baf bai bak bap bat bba bbb bbe bbf bbi bbk bbp bbt be- bea beb bee bef bei bek bep bet bfa bfb bfe bff bfi bfp bft bi- bia bib bie bif bii bik bip bit bka bkb bke bkf bkk bkp bkt bpa bpb bpe bpf bpi bpp bpt bta btb bte btf bti btk btp btt eaa eab eae eaf eai eak eap eat eba ebb ebe ebf ebi ebk ebp ebt eea eeb eee eef eek eep eet ef- efa efb efe eff efi efp eft eia eib eie eif eii eik eip eit eka ekb eke ekf eki ekp ekt ep- epa epb epe epf epi epp ept eta etb ete etf eti etk etp ett faa fab fae faf fai fak fap fat fba fbb fbe fbf fbi fbk fbp fbt fea feb fee fef fei fek fep fet ffa ffe fff ffi ffk ffp fft fia fib fie fif fii fik fip fit fka fkb fkf fki fkk fkp fkt fpa fpb fpe fpi fpk fpp fpt fta ftb fte ftf fti ftk ftp ftt i-f ia- iaa iab iae iaf iai iap iat iba ibb ibe ibf ibi ibk ibp ibt ie- iea iee ief iei iek iep iet ifa ifb ife iff ifi ifp ift iia iib iie iif iii iip iit ika ikb ike ikf iki ikk ikt ipa ipb ipe ipf ipi ipp ipt ita itb ite itf iti itk itp itt k-t ka- kaa kab kae kaf kai kak kap kat kba kbb kbe kbf kbi kbk kbp ke- kea keb kee kef kei kek kep ket kfa kff kfi kia kib kie kif kii kik kip kit kkb kke kki kkk kkp kkt kpa kpe kpf kpi kpk kpp kpt kta ktb kte ktf ktk ktp ktt p-p paa pab pae paf pai pak pap pat pba pbb pbe pbf pbi pbk pbp pbt pea peb pee pef pei pek pep pet pfa pfb pfe pff pfi pfk pfp pft pia pib pie pif pii pik pip pit pka pkb pke pkf pki pkp pkt ppa ppb ppe ppf ppi ppk ppp ppt pt- pta ptb pte ptf pti ptk ptp ptt taa tab tae taf tai tak tap tat tba tbb tbe tbf tbi tbk tbp tbt te- tea teb tee tef tei tek tep tet tfa tfb tfe tff tfi tfk tfp tft tia tib tie tif tii tik tip tit tka tkb tke tkk tkp tkt tpa tpb tpe tpf tpi tpk tpp tpt tta ttb tte ttf tti ttk ttp ttt