a-a a-b a-i aaa aab aad aai aao aap aar aav ab- aba abb abd abi abo abp abr abv ad- ada adb add adi ado adp adr adv ai- aia aib aid aii aio aip air aiv aoa aob aod aoi aoo aop aor aov ap- apa apb apd api apo app apr apv ar- ara arb ard ari aro arp arr arv av- ava avb avd avi avo avp avr b-p baa bab bad bai bao bap bar bav bba bbb bbd bbi bbo bbp bbr bda bdb bdd bdi bdo bdp bdr bdv bi- bia bib bid bii bio bip bir biv boa bob bod boi boo bop bor bov bpa bpb bpd bpi bpo bpp bpr bpv bra brb brd bri bro brp brr brv bva bvb bvd bvi bvo bvp bvr bvv daa dab dad dai dao dap dar dav dba dbb dbd dbi dbo dbp dbr dbv dda ddb ddd ddi ddo ddp ddr di- dia dib did dii dio dip dir div doa dob dod doi doo dop dor dov dpa dpb dpd dpi dpo dpp dpr dpv dra drb drd dri dro drp drr drv dva dvb dvd dvi dvp dvr i-d i-v ia- iaa iab iad iai iao iap iar iav iba ibb ibd ibi ibo ibp ibr ibv ida idb idd idi ido idp idr idv iia iib iid iii iio iip iir io- ioa iob iod ioi ioo iop ior iov ipa ipb ipd ipi ipo ipp ipr ipv ir- ira irb ird iri iro irp irr irv iva ivb ivd ivi ivo ivp ivr ivv o-i oaa oab oad oai oao oap oar oav ob- oba obb obd obi obo obp obr obv oda odb odd odi odo odp odr odv oia oib oid oii oio oip oir oiv oo- ooa oob ood ooi ooo oop oor oov op- opa opb opd opi opo opp opr opv or- ora orb ord ori oro orp orr orv ov- ova ovb ovd ovi ovo ovp ovv p-p paa pab pad pai pao pap par pav pba pbb pbd pbi pbo pbp pbr pda pdb pdd pdi pdo pdp pdr pdv pia pib pid pii pio pip pir piv poa pob pod poi poo pop por pov ppa ppb ppd ppi ppo ppp ppr ppv pra prb prd pri pro prp prr prv pva pvb pvd pvi pvo pvp pvr pvv ra- raa rab rad rai rao rap rar rav rba rbb rbd rbi rbo rbp rbr rda rdb rdd rdi rdo rdp rdr rdv ria rib rid rii rio rip rir riv roa rob rod roi roo rop ror rov rpa rpb rpd rpi rpo rpp rpr rpv rra rrb rrd rri rrp rrr rva rvb rvd rvi rvo rvp rvr rvv v-a vaa vab vad vai vao vap var vav vba vbd vbi vbo vbr vbv vdb vdd vdi vdo vdp vdr vdv vi- via vib vid vii vio vip vir viv voa vob vod voi voo vop vor vov vpa vpb vpd vpi vpo vpp vpr vra vrb vrd vri vrp vrr vva vvb vvi vvo vvr vvv