a-a a-i aaa aaf aai aan aap aar af- afa aff afi afn afp afr ai- aia aif aii ain aip air an- ana anf ani ann anp anr ap- apa apf api apn app apr ar- ara arf ari arn arp arr faa faf fai fan fap far ffa fff ffi ffn ffp ffr fia fif fii fin fip fir fna fnf fni fnn fnp fnr fpa fpi fpn fpp fpr fra frf fri frn frp frr i-f ia- iaa iaf iai ian iap iar ifa iff ifi ifn ifp ifr iia iif iii iin iip iir in- ina inf ini inn inp inr ipa ipf ipi ipn ipp ipr ir- ira irf iri irn irp irr n-i naa naf nai nan nap nar nfa nff nfi nfn nfp nfr nia nif nii nin nip nir nna nnf nni nnn nnp npa npf npi npn npp npr nra nrf nri nrn nrp nrr p-p paa paf pai pan pap par pfa pff pfi pfn pfp pfr pia pif pii pin pip pir pn- pna pnf pni pnn pnp pnr ppa ppf ppi ppn ppp ppr pra prf pri prn prp prr ra- raa raf rai ran rap rar rfa rff rfi rfn rfp rfr ria rif rii rin rip rir rna rni rnn rnp rnr rpa rpf rpi rpn rpp rpr rra rrf rri rrn rrp rrr