a-a a-b a-i a-t aaa aab aae aai aak aan aap aat ab- aba abb abe abi abk abn abp abt aea aeb aee aei aek aen aep aet ai- aia aib aie aii aik ain aip ait aka akb ake aki akk akn akp an- ana anb ane ani ank ann anp ant ap- apa apb ape api apk apn app apt at- ata atb ate ati atn atp att b-p baa bab bae bai bak ban bap bat bba bbb bbe bbi bbk bbn bbp bbt be- bea beb bee bei bek ben bep bet bi- bia bib bie bii bik bin bip bit bka bkb bke bkk bkn bkp bkt bna bnb bne bni bnk bnn bnp bnt bpa bpb bpe bpi bpn bpp bpt bta btb bte bti btk btn btp btt eaa eab eae eai eak ean eap eat eba ebb ebe ebi ebk ebn ebp ebt eea eeb eee eek een eep eet eia eib eie eii eik ein eip eit eka ekb eke eki ekp ekt en- ena enb ene eni enk enn enp ent ep- epa epb epe epi epn epp ept eta etb ete eti etk etn etp ett ia- iaa iab iae iai ian iap iat iba ibb ibe ibi ibk ibn ibp ibt ie- iea iee iei iek ien iep iet iia iib iie iii iin iip iit ika ikb ike iki ikk ikt in- ina inb ine ini ink inn inp int ipa ipb ipe ipi ipn ipp ipt ita itb ite iti itk itn itp itt k-t ka- kaa kab kae kai kak kan kap kat kba kbb kbe kbi kbk kbn kbp ke- kea keb kee kei kek ken kep ket kia kib kie kii kik kin kip kit kkb kke kki kkk kkn kkp kkt kn- kna kne kni knk knn knp knt kpa kpe kpi kpk kpn kpp kpt kta ktb kte ktk ktn ktp ktt n-i naa nab nae nai nak nan nap nat nba nbb nbe nbi nbk nbn nbp nbt ne- nea neb nee nei nek nen nep net nia nib nie nii nik nin nip nit nka nke nki nkk nkn nkp nkt nna nnb nne nni nnk nnn nnp nnt npa npb npe npi npn npp npt nta ntb nte nti ntk ntn ntp ntt p-p paa pab pae pai pak pan pap pat pba pbb pbe pbi pbk pbn pbp pbt pea peb pee pei pek pen pep pet pia pib pie pii pik pin pip pit pka pkb pke pki pkn pkp pkt pn- pna pnb pne pni pnk pnn pnp pnt ppa ppb ppe ppi ppk ppn ppp ppt pt- pta ptb pte pti ptk ptn ptp ptt taa tab tae tai tak tan tap tat tba tbb tbe tbi tbk tbn tbp tbt te- tea teb tee tei tek ten tep tet tia tib tie tii tik tin tip tit tka tkb tke tkk tkp tkt tna tnb tne tni tnk tnn tnp tnt tpa tpb tpe tpi tpk tpn tpp tpt tta ttb tte tti ttk ttn ttp ttt