-al -ol a-a a-b a-c aaa aab aac aah aal aao aar ab- aba abb abc abh abl abo abr ac- aca acb acc ach acl aco acr aha ahb ahc ahh ahl aho ahr al- ala alb alc alh all alo alr aoa aob aoc aoh aol aoo aor ar- ara arb arc arh arl aro arr baa bab bac bah bal bao bar bba bbb bbc bbh bbl bbo bbr bca bcb bcc bch bcl bco bcr bha bhb bhc bhh bhl bho bhr bla blb blc blh bll blo blr boa bob boc boh bol boo bor bra brb brh brl bro brr c-- caa cab cac cah cal cao car cba cbb cbc cbh cbl cbo cbr cca ccb ccc cch ccl cco ccr ch- cha chb chc chh chl cho chr cl- cla clb clc clh cll clo clr co- coa cob coc coh col coo cor cra crb crc crh crl cro crr haa hab hac hah hal hao har hba hbb hbc hbh hbl hbo hbr hca hcb hcc hch hcl hco hcr hha hhb hhc hhh hhl hho hhr hla hlb hlc hlh hll hlo hlr hoa hob hoc hoh hol hoo hor hr- hra hrb hrc hrh hrl hro hrr la- laa lab lac lah lal lao lar lba lbb lbc lbh lbl lbo lbr lca lcb lcc lch lcl lco lcr lha lhb lhc lhh lho lhr lla llb llc lll llo llr loa lob loc loh lol loo lor lra lrb lrc lrh lro lrr oaa oab oac oah oal oao oar ob- oba obb obc obh obl obo obr oc- oca ocb occ och ocl oco ocr oha ohc ohh ohl oho ohr ola olb olc oll olo oo- ooa oob ooc ooh ool ooo oor or- ora orb orc orh orl oro orr ra- raa rab rac rah ral rao rar rba rbb rbc rbh rbl rbo rbr rca rcb rcc rch rcl rco rcr rh- rha rhb rhc rhh rhl rho rhr rla rlc rlh rll rlo rlr roa rob roc roh rol roo ror rra rrb rrc rrh rrl rrr