a-a a-b a-c aaa aab aac aam aar aau aay ab- aba abb abc abm abr abu aby ac- aca acb acc acm acr acu acy ama amb amc amm amr amu amy ar- ara arb arc arm arr aru ary au- aua aub auc aum aur ay- aya ayc ayr ayu b-u baa bab bac bam bar bau bay bba bbb bbc bbm bbr bbu bby bca bcb bcc bcm bcr bcu bcy bma bmb bmc bmm bmr bmu bra brb brm brr bru bry bua bub buc bum bur buu buy by- bya byc bym byr byu c-- caa cab cac cam car cau cay cba cbb cbc cbm cbr cbu cby cca ccb ccc ccm ccr ccu cma cmb cmc cmm cmr cmu cmy cra crb crc crm crr cru cry cua cub cuc cum cur cuu cuy cya cyb cyc cym cyr m-r maa mab mac mam mar mau may mba mbb mbc mbm mbr mbu mc- mca mcb mcc mcm mcr mcu mma mmb mmc mmm mmr mmu mra mrb mrc mrm mrr mru mry mua mub muc mum mur muu muy my- mya myb myc mym myr myu ra- raa rab rac ram rar rau ray rba rbb rbc rbm rbr rbu rca rcb rcc rcm rcr rcu rma rmb rmc rmm rmr rra rrb rrc rrm rrr rru rua rub ruc rum rur ruu ruy ry- rya ryc rym ryr ryu ryy ua- uaa uab uac uam uar uau uay uba ubb ubc ubr ubu uby uca ucb ucc ucm ucr ucu um- uma umb umc umm umr umu ur- ura urb urc urm urr uru ury uua uuc uum uur uuu uyc uyu yaa yab yac yam yar yau yay ybc ybm ybr yby yca ycc ycu ycy yma ymc ymm yra yrc yru yua yum yur yuu yuy yyb yyc yyu yyy