a-a a-b a-i a-t aaa aab aai aap aar aat aav ab- aba abb abi abp abr abt abv ai- aia aib aii aip air ait aiv ap- apa apb api app apr apt apv ar- ara arb ari arp arr art arv at- ata atb ati atp atr att atv av- ava avb avi avp avr avt b-p baa bab bai bap bar bat bav bba bbb bbi bbp bbr bbt bi- bia bib bii bip bir bit biv bpa bpb bpi bpp bpr bpt bpv bra brb bri brp brr brt brv bta btb bti btp btr btt btv bva bvb bvi bvp bvr bvt bvv i-v ia- iaa iab iai iap iar iat iav iba ibb ibi ibp ibr ibt ibv iia iib iii iip iir iit ipa ipb ipi ipp ipr ipt ipv ir- ira irb iri irp irr irt irv ita itb iti itp itt itv iva ivb ivi ivp ivr ivt ivv p-p paa pab pai pap par pat pav pba pbb pbi pbp pbr pbt pia pib pii pip pir pit piv ppa ppb ppi ppp ppr ppt ppv pra prb pri prp prr prt prv pt- pta ptb pti ptp ptr ptt ptv pva pvb pvi pvp pvr pvt pvv ra- raa rab rai rap rar rat rav rba rbb rbi rbp rbr rbt ria rib rii rip rir rit riv rpa rpb rpi rpp rpr rpt rpv rra rrb rri rrp rrr rrt rta rtb rti rtp rtr rtt rtv rva rvb rvi rvp rvr rvt rvv taa tab tai tap tar tat tav tba tbb tbi tbp tbr tbt tbv tia tib tii tip tir tit tiv tpa tpb tpi tpp tpr tpt tpv tra trb tri trp trr trt trv tta ttb tti ttp ttr ttt ttv tva tvb tvi tvp tvr tvt v-a vaa vab vai vap var vat vav vba vbi vbr vbv vi- via vib vii vip vir vit viv vpa vpb vpi vpp vpr vpt vra vrb vri vrp vrr vrt vta vtb vti vtr vtt vtv vva vvb vvi vvr vvt vvv