a-a a-i aaa aaf aai aap aar aav af- afa aff afi afp afr afv ai- aia aif aii aip air aiv ap- apa apf api app apr apv ar- ara arf ari arp arr arv av- ava avf avi avp avr faa faf fai fap far fav ffa fff ffi ffp ffr ffv fia fif fii fip fir fpa fpi fpp fpr fpv fra frf fri frp frr fva fvp i-f i-v ia- iaa iaf iai iap iar iav ifa iff ifi ifp ifr iia iif iii iip iir ipa ipf ipi ipp ipr ipv ir- ira irf iri irp irr irv iva ivf ivi ivp ivr ivv p-p paa paf pai pap par pav pfa pff pfi pfp pfr pfv pia pif pii pip pir piv ppa ppf ppi ppp ppr ppv pra prf pri prp prr prv pva pvf pvi pvp pvr pvv ra- raa raf rai rap rar rav rfa rff rfi rfp rfr rfv ria rif rii rip rir riv rpa rpf rpi rpp rpr rpv rra rrf rri rrp rrr rva rvf rvi rvp rvr rvv v-a vaa vai vap var vav vfa vff vfi vfp vfr vfv vi- via vif vii vip vir viv vpa vpf vpi vpp vpr vra vrf vri vrp vrr vva vvi vvr vvv