-al -ol a-a a-b aaa aab aah aal aao aar ab- aba abb abh abl abo abr aha ahb ahh ahl aho ahr al- ala alb alh all alo alr aoa aob aoh aol aoo aor ar- ara arb arh arl aro arr baa bab bah bal bao bar bba bbb bbh bbl bbo bbr bha bhb bhh bhl bho bhr bla blb blh bll blo blr boa bob boh bol boo bor bra brb brh brl bro brr haa hab hah hal hao har hba hbb hbh hbl hbo hbr hha hhb hhh hhl hho hhr hla hlb hlh hll hlo hlr hoa hob hoh hol hoo hor hr- hra hrb hrh hrl hro hrr la- laa lab lah lal lao lar lba lbb lbh lbl lbo lbr lha lhb lhh lho lhr lla llb lll llo llr loa lob loh lol loo lor lra lrb lrh lro lrr oaa oab oah oal oao oar ob- oba obb obh obl obo obr oha ohh ohl oho ohr ola olb oll olo oo- ooa oob ooh ool ooo oor or- ora orb orh orl oro orr ra- raa rab rah ral rao rar rba rbb rbh rbl rbo rbr rh- rha rhb rhh rhl rho rhr rla rlh rll rlo rlr roa rob roh rol roo ror rra rrb rrh rrl rrr