a-a a-b a-i aaa aab aah aai aan aao aap aar ab- aba abb abh abi abn abo abp abr aha ahb ahh ahi ahn aho ahp ahr ai- aia aib aih aii ain aio aip air an- ana anb anh ani ann ano anp anr aoa aob aoh aoi aon aoo aop aor ap- apa apb aph api apn apo app apr ar- ara arb arh ari arn aro arp arr b-p baa bab bah bai ban bao bap bar bba bbb bbh bbi bbn bbo bbp bbr bha bhb bhh bhi bho bhp bhr bi- bia bib bih bii bin bio bip bir bna bnb bni bnn bno bnp bnr boa bob boh boi bon boo bop bor bpa bpb bph bpi bpn bpo bpp bpr bra brb brh bri brn bro brp brr h-i haa hab hah hai han hao hap har hba hbb hbh hbi hbn hbo hbp hbr hha hhb hhh hhi hhn hho hhp hhr hia hib hih hii hin hio hip hir hna hnb hnh hnn hno hoa hob hoh hoi hon hoo hop hor hpa hpb hph hpi hpn hpo hpp hpr hr- hra hrb hrh hri hrn hro hrp hrr ia- iaa iab iah iai ian iao iap iar iba ibb ibh ibi ibn ibo ibp ibr iha ihb ihh ihi ihn iho ihp ihr iia iib iih iii iin iio iip iir in- ina inb inh ini inn ino inp inr io- ioa iob ioh ioi ion ioo iop ior ipa ipb ipi ipn ipo ipp ipr ir- ira irb iri irn iro irp irr n-i naa nab nah nai nan nao nap nar nba nbb nbi nbn nbo nbp nbr nha nhb nhh nhi nhn nhp nhr nia nib nih nii nin nio nip nir nna nnb nnh nni nnn nno nnp no- noa nob noh noi non noo nop nor npa npb nph npi npn npo npp npr nra nrb nri nrn nro nrp nrr o-i oaa oab oah oai oan oao oap oar ob- oba obb obh obi obn obo obp obr oha ohh ohi ohn oho ohp ohr oia oib oii oin oio oip oir on- ona onb onh oni onn ono onp onr oo- ooa oob ooh ooi oon ooo oop oor op- opa opb oph opi opn opo opp opr or- ora orb orh ori orn oro orp orr p-p paa pab pah pai pan pao pap par pba pbb pbi pbn pbo pbp pbr pha phb phi phn pho php phr pia pib pih pii pin pio pip pir pn- pna pnb pnh pni pnn pno pnp pnr poa pob poh poi pon poo pop por ppa ppb pph ppi ppn ppo ppp ppr pra prb prh pri prn pro prp prr ra- raa rab rah rai ran rao rap rar rba rbb rbh rbi rbn rbo rbp rbr rh- rha rhb rhh rhi rhn rho rhp rhr ria rib rih rii rin rio rip rir rna rnb rnh rni rnn rno rnp rnr roa rob roh roi ron roo rop ror rpa rpb rph rpi rpn rpo rpp rpr rra rrb rrh rri rrn rrp rrr