a-a a-b a-c aaa aab aac aah aan aao aar aau aay ab- aba abb abc abh abn abo abr abu aby ac- aca acb acc ach acn aco acr acu acy aha ahb ahc ahh ahn aho ahr ahu ahy an- ana anb anc anh ann ano anr anu any aoa aob aoc aoh aon aoo aor aou ar- ara arb arc arh arn aro arr aru ary au- aua aub auc auh aun auo aur ay- aya ayc ayh ayn ayo ayr ayu b-u baa bab bac bah ban bao bar bau bay bba bbb bbc bbh bbn bbo bbr bbu bby bca bcb bcc bch bcn bco bcr bcu bcy bha bhb bhc bhh bho bhr bhu bna bnb bnc bnn bno bnr bnu boa bob boc boh bon boo bor bou boy bra brb brh brn bro brr bru bry bua bub buc buh bun buo bur buu buy by- bya byc byh byn byo byr byu c-- caa cab cac cah can cao car cau cay cba cbb cbc cbh cbn cbo cbr cbu cby cca ccb ccc cch ccn cco ccr ccu ch- cha chb chc chh chn cho chr chu chy cn- cna cnb cnc cnh cnn cno cnr cnu cny co- coa cob coc coh con coo cor cou coy cra crb crc crh crn cro crr cru cry cua cub cuc cuh cun cuo cur cuu cuy cya cyb cyc cyn cyo cyr haa hab hac hah han hao har hau hay hba hbb hbc hbh hbn hbo hbr hbu hby hca hcb hcc hch hcn hco hcr hcy hha hhb hhc hhh hhn hho hhr hhu hhy hna hnb hnc hnh hnn hno hnu hny hoa hob hoc hoh hon hoo hor hou hoy hr- hra hrb hrc hrh hrn hro hrr hru hua hub huc huh hun huo hur huu huy hy- hya hyb hyc hyh hyn hyo hyr hyy naa nab nac nah nan nao nar nau nay nba nbb nbc nbn nbo nbr nbu nca ncb ncc nch ncn nco ncr ncu nha nhb nhc nhh nhn nhr nhu nhy nna nnb nnc nnh nnn nno nnu no- noa nob noc noh non noo nor nou noy nra nrb nrc nrn nro nrr nru nry nua nub nuc nuh nun nuo nur nuu nuy nya nyc nyn nyo nyu nyy oaa oab oac oah oan oao oar oau ob- oba obb obc obh obn obo obr obu oby oc- oca ocb occ och ocn oco ocr ocu oha ohc ohh ohn oho ohr ohu on- ona onb onc onh onn ono onr onu ony oo- ooa oob ooc ooh oon ooo oor or- ora orb orc orh orn oro orr oru ory ou- oua ouc ouh oun ouo our oya oyo ra- raa rab rac rah ran rao rar rau ray rba rbb rbc rbh rbn rbo rbr rbu rca rcb rcc rch rcn rco rcr rcu rh- rha rhb rhc rhh rhn rho rhr rhu rna rnb rnc rnh rnn rno rnr rnu rny roa rob roc roh ron roo ror rou roy rra rrb rrc rrh rrn rrr rru rua rub ruc ruh run ruo rur ruu ruy ry- rya ryc ryn ryo ryr ryu ryy ua- uaa uab uac uah uan uao uar uau uay uba ubb ubc ubh ubn ubo ubr ubu uby uca ucb ucc uch ucn uco ucr ucu uha uhb uhc uhh uho uhr uhu uhy un- una unb unc unh unn uno unr unu uny uoa uob uoc uon uoo uor ur- ura urb urc urn uro urr uru ury uua uuc uun uur uuu uyc uyo uyu yaa yab yac yah yan yao yar yau yay ybc ybr yby yca ycc ych yco ycu ycy yha yhc yhu yna ynn ynu yny yob yoc yon yoo yor you yoy yra yrc yrn yro yru yua yuh yun yuo yur yuu yuy yyb yyc yyu yyy