a-a a-b a-i aaa aab aae aah aai aan aao aap ab- aba abb abe abh abi abn abo abp aea aeb aee aeh aei aen aeo aep aha ahb ahe ahh ahi ahn aho ahp ai- aia aib aie aih aii ain aio aip an- ana anb ane anh ani ann ano anp aoa aob aoe aoh aoi aon aoo aop ap- apa apb ape aph api apn apo app b-p baa bab bae bah bai ban bao bap bba bbb bbe bbh bbi bbn bbo bbp be- bea beb bee beh bei ben beo bep bha bhb bhe bhh bhi bho bhp bi- bia bib bie bih bii bin bio bip bna bnb bne bni bnn bno bnp boa bob boe boh boi bon boo bop bpa bpb bpe bph bpi bpn bpo bpp eaa eab eae eah eai ean eao eap eba ebb ebe ebh ebi ebn ebo ebp eea eeb eee een eeo eep eha ehb ehe ehh ehi ehn eho ehp eia eib eie eii ein eio eip en- ena enb ene enh eni enn eno enp eo- eoa eob eoe eoh eoi eon eoo eop ep- epa epb epe eph epi epn epo epp h-i haa hab hae hah hai han hao hap hba hbb hbe hbh hbi hbn hbo hbp he- hea heb hee heh hei hen heo hep hha hhb hhe hhh hhi hhn hho hhp hia hib hie hih hii hin hio hip hna hnb hne hnh hnn hno hoa hob hoe hoh hoi hon hoo hop hpa hpb hpe hph hpi hpn hpo hpp ia- iaa iab iae iah iai ian iao iap iba ibb ibe ibh ibi ibn ibo ibp ie- iea iee iei ien iep iha ihb ihe ihh ihi ihn iho ihp iia iib iie iih iii iin iio iip in- ina inb ine inh ini inn ino inp io- ioa iob ioe ioh ioi ion ioo iop ipa ipb ipe ipi ipn ipo ipp n-i naa nab nae nah nai nan nao nap nba nbb nbe nbi nbn nbo nbp ne- nea neb nee neh nei nen neo nep nha nhb nhe nhh nhi nhn nhp nia nib nie nih nii nin nio nip nna nnb nne nnh nni nnn nno nnp no- noa nob noe noh noi non noo nop npa npb npe nph npi npn npo npp o-i oaa oab oae oah oai oan oao oap ob- oba obb obe obh obi obn obo obp oea oeb oee oeh oei oen oeo oep oha ohe ohh ohi ohn oho ohp oia oib oie oii oin oio oip on- ona onb one onh oni onn ono onp oo- ooa oob ooh ooi oon ooo oop op- opa opb ope oph opi opn opo opp p-p paa pab pae pah pai pan pao pap pba pbb pbe pbi pbn pbo pbp pea peb pee peh pei pen peo pep pha phb phe phi phn pho php pia pib pie pih pii pin pio pip pn- pna pnb pne pnh pni pnn pno pnp poa pob poe poh poi pon poo pop ppa ppb ppe pph ppi ppn ppo ppp