a-a a-b aaa aab aaj aan aao aar aau ab- aba abb abj abn abo abr abu aja ajb ajj ajn ajo ajr aju an- ana anb anj ann ano anr anu aoa aob aoj aon aoo aor aou ar- ara arb arj arn aro arr aru au- aua aub auj aun auo aur b-u baa bab baj ban bao bar bau bba bbb bbn bbo bbr bbu bja bjj bjn bjr bju bna bnb bnj bnn bno bnr bnu boa bob boj bon boo bor bou bra brb brj brn bro brr bru bua bub buj bun buo bur buu jaa jab jaj jan jao jar jau jba jbj jbo jbr jbu jja jjb jjj jjr jju jna jnj jnn jno jnr jnu joa job joj jon joo jor jou jra jrb jrn jro jrr jub jun juo jur naa nab naj nan nao nar nau nba nbb nbn nbo nbr nbu nja njn nju nna nnb nnn nno nnu no- noa nob noj non noo nor nou nra nrb nrj nrn nro nrr nru nua nub nuj nun nuo nur nuu oaa oab oaj oan oao oar oau ob- oba obb obj obn obo obr obu oja ojb ojo oju on- ona onb onj onn ono onr onu oo- ooa oob oon ooo oor or- ora orb orn oro orr oru ou- oua oun ouo our ra- raa rab raj ran rao rar rau rba rbb rbn rbo rbr rbu rja rjr rna rnb rnn rno rnr rnu roa rob roj ron roo ror rou rra rrb rrn rrr rru rua rub run ruo rur ruu ua- uaa uab uaj uan uao uar uau uba ubb ubn ubo ubr ubu ujo un- una unb unn uno unr unu uoa uob uoj uon uoo uor ur- ura urb urn uro urr uru uua uun uur uuu