a-a a-b a-i aaa aab aad aae aai aak aap ab- aba abb abd abe abi abk abp ad- ada adb add ade adi adk adp aea aeb aed aee aei aek aep ai- aia aib aid aie aii aik aip aka akb akd ake aki akk akp ap- apa apb apd ape api apk app b-p baa bab bad bae bai bak bap bba bbb bbd bbe bbi bbk bbp bda bdb bdd bde bdi bdk bdp be- bea beb bed bee bei bek bep bi- bia bib bid bie bii bik bip bka bkb bke bkk bkp bpa bpb bpd bpe bpi bpp daa dab dad dae dai dak dap dba dbb dbd dbe dbi dbk dbp dda ddb ddd dde ddi ddk ddp de- dea deb ded dee dei dek dep di- dia dib did die dii dik dip dka dkb dke dki dkk dkp dpa dpb dpd dpe dpi dpk dpp eaa eab ead eae eai eak eap eba ebb ebd ebe ebi ebk ebp ed- eda edb edd ede edi edk edp eea eeb eed eee eek eep eia eib eid eie eii eik eip eka ekb ekd eke eki ekp ep- epa epb epd epe epi epp i-d ia- iaa iab iad iae iai iap iba ibb ibd ibe ibi ibk ibp ida idb idd ide idi idk idp ie- iea ied iee iei iek iep iia iib iid iie iii iip ika ikb ike iki ikk ipa ipb ipd ipe ipi ipp ka- kaa kab kad kae kai kak kap kba kbb kbd kbe kbi kbk kbp kda kdb kde kdk kdp ke- kea keb ked kee kei kek kep kia kib kid kie kii kik kip kkb kke kki kkk kkp kpa kpd kpe kpi kpk kpp p-p paa pab pad pae pai pak pap pba pbb pbd pbe pbi pbk pbp pda pdb pdd pde pdi pdk pdp pea peb ped pee pei pek pep pia pib pid pie pii pik pip pka pkb pkd pke pki pkp ppa ppb ppd ppe ppi ppk ppp