-er a-a a-i aaa aae aai aan aap aar aea aee aei aen aep aer ai- aia aie aii ain aip air an- ana ane ani ann anp anr ap- apa ape api apn app apr ar- ara are ari arn arp arr eaa eae eai ean eap ear eea eee een eep eer eia eie eii ein eip eir en- ena ene eni enn enp enr ep- epa epe epi epn epp epr era ere eri ern erp err ia- iaa iae iai ian iap iar ie- iea iee iei ien iep ier iia iie iii iin iip iir in- ina ine ini inn inp inr ipa ipe ipi ipn ipp ipr ir- ira ire iri irn irp irr n-i naa nae nai nan nap nar ne- nea nee nei nen nep ner nia nie nii nin nip nir nna nne nni nnn nnp npa npe npi npn npp npr nra nre nri nrn nrp nrr p-p paa pae pai pan pap par pea pee pei pen pep per pia pie pii pin pip pir pn- pna pne pni pnn pnp pnr ppa ppe ppi ppn ppp ppr pra pre pri prn prp prr ra- raa rae rai ran rap rar re- rea ree rei ren rep rer ria rie rii rin rip rir rna rni rnn rnp rnr rpa rpe rpi rpn rpp rpr rra rri rrn rrp rrr