a-a a-b a-i aaa aab aad aae aai aan aap ab- aba abb abd abe abi abn abp ad- ada adb add ade adi adn adp aea aeb aed aee aei aen aep ai- aia aib aid aie aii ain aip an- ana anb and ane ani ann anp ap- apa apb apd ape api apn app b-p baa bab bad bae bai ban bap bba bbb bbd bbe bbi bbn bbp bda bdb bdd bde bdi bdp be- bea beb bed bee bei ben bep bi- bia bib bid bie bii bin bip bna bnb bnd bne bni bnn bnp bpa bpb bpd bpe bpi bpn bpp daa dab dad dae dai dan dap dba dbb dbd dbe dbi dbn dbp dda ddb ddd dde ddi ddn ddp de- dea deb ded dee dei den dep di- dia dib did die dii din dip dna dnb dnd dne dni dnn dnp dpa dpb dpd dpe dpi dpn dpp eaa eab ead eae eai ean eap eba ebb ebd ebe ebi ebn ebp ed- eda edb edd ede edi edn edp eea eeb eed eee een eep eia eib eid eie eii ein eip en- ena enb end ene eni enn enp ep- epa epb epd epe epi epn epp i-d ia- iaa iab iad iae iai ian iap iba ibb ibd ibe ibi ibn ibp ida idb idd ide idi idn idp ie- iea ied iee iei ien iep iia iib iid iie iii iin iip in- ina inb ind ine ini inn inp ipa ipb ipd ipe ipi ipn ipp n-i naa nab nad nae nai nan nap nba nbb nbd nbe nbi nbn nbp nda ndb ndd nde ndi ndn ndp ne- nea neb ned nee nei nen nep nia nib nid nie nii nin nip nna nnb nne nni nnn nnp npa npb npd npe npi npn npp p-p paa pab pad pae pai pan pap pba pbb pbd pbe pbi pbn pbp pda pdb pdd pde pdi pdn pdp pea peb ped pee pei pen pep pia pib pid pie pii pin pip pn- pna pnb pnd pne pni pnn pnp ppa ppb ppd ppe ppi ppn ppp