a-a a-i aaa aaf aai aap aav af- afa aff afi afp afv ai- aia aif aii aip aiv ap- apa apf api app apv av- ava avf avi avp faa faf fai fap fav ffa fff ffi ffp ffv fia fif fii fip fpa fpi fpp fpv fva fvp i-f i-v ia- iaa iaf iai iap iav ifa iff ifi ifp iia iif iii iip ipa ipf ipi ipp ipv iva ivf ivi ivp ivv p-p paa paf pai pap pav pfa pff pfi pfp pfv pia pif pii pip piv ppa ppf ppi ppp ppv pva pvf pvi pvp pvv v-a vaa vai vap vav vfa vff vfi vfp vfv vi- via vif vii vip viv vpa vpf vpi vpp vva vvi vvv