a-a a-i aaa aai aao aap aar aas aax aay ai- aia aii aio aip air ais aix aiy aoa aoi aoo aop aor aos aox ap- apa api apo app apr aps apx apy ar- ara ari aro arp arr ars arx ary as- asa asi aso asp asr ass asx asy ax- axa axi axo axp axr axs axx ay- aya ayi ayo ayp ayr ays ayx ia- iaa iai iao iap iar ias iia iii iio iip iir iis iix io- ioa ioi ioo iop ior ios ipa ipi ipo ipp ipr ips ipx ipy ir- ira iri iro irp irr irs irx iry is- isa isi iso isp isr iss isy ixi ixy iya iyo iyr iys iyy o-i oaa oai oao oap oar oas oax oia oii oio oip oir ois oo- ooa ooi ooo oop oor oos oox op- opa opi opo opp opr ops opx opy or- ora ori oro orp orr ors orx ory os- osa osi oso osp osr oss osx ox- oxa oxi oxo oxx oxy oya oyi oyo oys p-p paa pai pao pap par pas pax pay pia pii pio pip pir pis pix poa poi poo pop por pos pox poy ppa ppi ppo ppp ppr pps ppx pra pri pro prp prr prs prx pry ps- psa psi pso psp psr pss psx psy pxr pxs py- pya pyo pyr pys pyx ra- raa rai rao rap rar ras rax ray ria rii rio rip rir ris rix riy roa roi roo rop ror ros rox roy rpa rpi rpo rpp rpr rps rpx rra rri rrp rrr rrs rsa rsi rso rsp rsr rss rsx rxp rxr rxs ry- rya ryo ryr rys ryy saa sai sao sap sar sas sax say sia sii sio sip sir sis six soa soi soo sop sor sos sox soy spa spi spo spp spr sps spx spy sr- sra sri sro srp srr srs srx sry ss- ssa ssi sso ssp ssr sss ssx sxi sxs sy- sya syi syp syr sys syx xaa xap xar xas xia xii xio xis xix xoa xoi xoo xop xor xos xox xpa xpo xpp xps xrx xry xsa xsi xsp xss xxi xxo xxp xxx xxy xyp xyr xyy yaa yai yao yap yar yas yax yay yii yio yip yir yis yoi yoo yop yor yos yox yoy ypa ypo yps yra yro yrp yrs ysa ysi yso ysp ysr yss ysy yxa yxy yys yyy