-al a-a a-b a-i aaa aab aai aal aar aas aau ab- aba abb abi abl abr abs abu ai- aia aib aii ail air ais aiu al- ala alb ali all alr als alu ar- ara arb ari arl arr ars aru as- asa asb asi asl asr ass asu au- aua aub aui aul aur aus b-u baa bab bai bal bar bas bau bba bbb bbi bbl bbr bbs bbu bi- bia bib bii bil bir bis biu bla blb bli bll blr bls blu bra brb bri brl brr brs bru bsa bsb bsi bsl bsr bss bsu bua bub bui bul bur bus buu ia- iaa iab iai ial iar ias iau iba ibb ibi ibl ibr ibs ibu iia iib iii iil iir iis iiu il- ila ilb ili ill ilr ils ilu ir- ira irb iri irl irr irs iru is- isa isb isi isl isr iss isu iu- iua iub iui iur ius la- laa lab lai lal lar las lau lba lbb lbi lbl lbr lbs lbu lia lib lii lil lir lis liu lla llb lli lll llr lls llu lra lrb lri lrr lrs lru lsa lsb lsi lsl lsr lss lsu lua lub lui lul lur lus luu ra- raa rab rai ral rar ras rau rba rbb rbi rbl rbr rbs rbu ria rib rii ril rir ris rla rli rll rlr rls rlu rra rrb rri rrl rrr rrs rru rsa rsb rsi rsl rsr rss rsu rua rub rui rur rus ruu saa sab sai sal sar sas sau sba sbb sbi sbl sbr sbs sbu sia sib sii sil sir sis siu sla slb sli sll slr sls slu sr- sra srb sri srl srr srs ss- ssa ssb ssi ssl ssr sss ssu sua sub sui sul sur sus suu ua- uaa uab uai ual uar uas uau uba ubb ubi ubl ubr ubs ubu uia uib uii uil uir uis uiu ula ulb uli ull ulr uls ulu ur- ura urb uri url urr urs uru usa usb usi usl usr uss usu uua uur uus uuu