-up a-a a-b a-i aaa aab aai aap aar aas aau aax ab- aba abb abi abp abr abs abu abx ai- aia aib aii aip air ais aiu aix ap- apa apb api app apr aps apu apx ar- ara arb ari arp arr ars aru arx as- asa asb asi asp asr ass asu asx au- aua aub aui aup aur aus aux ax- axa axi axp axr axs axx b-p b-u baa bab bai bap bar bas bau bax bba bbb bbi bbp bbr bbs bbu bbx bi- bia bib bii bip bir bis biu bix bpa bpb bpi bpp bpr bps bpu bpx bra brb bri brp brr brs bru brx bsa bsb bsi bsp bsr bss bsu bsx bua bub bui bup bur bus buu bux bxb bxi bxx ia- iaa iab iai iap iar ias iau iba ibb ibi ibp ibr ibs ibu ibx iia iib iii iip iir iis iiu iix ipa ipb ipi ipp ipr ips ipu ipx ir- ira irb iri irp irr irs iru irx is- isa isb isi isp isr iss isu iu- iua iub iui iup iur ius ixi p-p paa pab pai pap par pas pau pax pba pbb pbi pbp pbr pbs pbu pbx pia pib pii pip pir pis piu pix ppa ppb ppi ppp ppr pps ppu ppx pra prb pri prp prr prs pru prx ps- psa psb psi psp psr pss psu psx pua pub pui pup pur pus puu pxr pxs ra- raa rab rai rap rar ras rau rax rba rbb rbi rbp rbr rbs rbu rbx ria rib rii rip rir ris rix rpa rpb rpi rpp rpr rps rpu rpx rra rrb rri rrp rrr rrs rru rsa rsb rsi rsp rsr rss rsu rsx rua rub rui rup rur rus ruu rux rxp rxr rxs saa sab sai sap sar sas sau sax sba sbb sbi sbp sbr sbs sbu sbx sia sib sii sip sir sis siu six spa spb spi spp spr sps spu spx sr- sra srb sri srp srr srs srx ss- ssa ssb ssi ssp ssr sss ssu ssx sua sub sui sup sur sus suu sux sxi sxs sxu ua- uaa uab uai uap uar uas uau uba ubb ubi ubp ubr ubs ubu ubx uia uib uii uip uir uis uiu up- upa upb upi upp upr ups upu upx ur- ura urb uri urp urr urs uru urx usa usb usi usp usr uss usu usx uua uur uus uuu uxb uxr uxu xaa xap xar xas xau xbr xbx xia xii xis xiu xix xpa xpb xpp xps xrx xsa xsb xsi xsp xss xui xup xus xxi xxp xxx