-er -up eee een eep eer ees eie eii ein eip eir eis eiu en- ene eni enn enp enr ens enu ep- epe epi epn epp epq epr eps epu eqe eqn eqp eqq eqs equ ere eri ern erp erq err ers eru es- ese esi esn esp esq esr ess esu eu- eue eui eun eup eur eus ie- iee iei ien iep ier ies iie iii iin iip iir iis iiu in- ine ini inn inp inq inr ins inu ipe ipi ipn ipp ipr ips ipu iqe iqs iqu ir- ire iri irn irp irq irr irs iru is- ise isi isn isp isq isr iss isu iu- iue iui iup iur ius n-i ne- nee nei nen nep ner nes neu nie nii nin nip niq nir nis niu nne nni nnn nnp nns nnu npe npi npn npp npr nps npu nqs nre nri nrn nrp nrr nrs nru nse nsi nsn nsp nsr nss nsu nue nui nun nup nuq nur nus nuu p-p pee pei pen pep per pes peu pie pii pin pip piq pir pis piu pn- pne pni pnn pnp pnr pns pnu ppe ppi ppn ppp ppq ppr pps ppu pqi pqq pqr pqs pre pri prn prp prq prr prs pru ps- pse psi psn psp psr pss psu pue pui pun pup pur pus puu qee qen qep qie qin qip qir qis qiu qne qni qns qpp qpr qps qqq qqu qre qri qrp qrs qru qsi qsp qsr qu- que qui qur qus re- ree rei ren rep req rer res reu rie rii rin rip riq rir ris rni rnn rnp rnr rns rnu rpe rpi rpn rpp rpr rps rpu rqn rqs rri rrn rrp rrq rrr rrs rru rse rsi rsn rsp rsq rsr rss rsu rue rui run rup rur rus ruu se- see sei sen sep seq ser ses seu sie sii sin sip siq sir sis siu sne sni snn snp snr sns snu spe spi spn spp spq spr sps spu sqi sqn sqq sqr sqs sr- sre sri srn srp srq srr srs ss- sse ssi ssn ssp ssq ssr sss ssu sue sui sun sup suq sur sus suu uee uei uen uep uer ues uie uii uin uip uiq uir uis uiu un- une uni unn unp unq unr uns unu up- upe upi upn upp upr ups upu ur- ure uri urn urp urr urs uru use usi usn usp usr uss usu uue uun uur uus uuu