-al -er a-a a-b a-c aaa aab aac aae aah aal aar ab- aba abb abc abe abh abl abr ac- aca acb acc ace ach acl acr aea aeb aec aee aeh ael aer aha ahb ahc ahe ahh ahl ahr al- ala alb alc ale alh all alr ar- ara arb arc are arh arl arr baa bab bac bae bah bal bar bba bbb bbc bbe bbh bbl bbr bca bcb bcc bce bch bcl bcr be- bea beb bec bee beh bel ber bha bhb bhc bhe bhh bhl bhr bla blb blc ble blh bll blr bra brb bre brh brl brr c-- caa cab cac cae cah cal car cba cbb cbc cbe cbh cbl cbr cca ccb ccc cce cch ccl ccr ce- cea ceb cec cee ceh cel cer ch- cha chb chc che chh chl chr cl- cla clb clc cle clh cll clr cra crb crc cre crh crl crr eaa eab eac eae eah eal ear eba ebb ebc ebe ebh ebl ebr ec- eca ecb ecc ece ech ecl ecr eea eeb eec eee eel eer eha ehb ehc ehe ehh ehl ehr ela elb elc ele elh ell elr era erb erc ere erh erl err haa hab hac hae hah hal har hba hbb hbc hbe hbh hbl hbr hca hcb hcc hce hch hcl hcr he- hea heb hec hee heh hel her hha hhb hhc hhe hhh hhl hhr hla hlb hlc hle hlh hll hlr hr- hra hrb hrc hre hrh hrl hrr la- laa lab lac lae lah lal lar lba lbb lbc lbe lbh lbl lbr lca lcb lcc lce lch lcl lcr lea leb lec lee leh lel ler lha lhb lhc lhh lhr lla llb llc lle lll llr lra lrb lrc lrh lrr ra- raa rab rac rae rah ral rar rba rbb rbc rbe rbh rbl rbr rca rcb rcc rce rch rcl rcr re- rea reb rec ree reh rel rer rh- rha rhb rhc rhe rhh rhl rhr rla rlc rle rlh rll rlr rra rrb rrc rrh rrl rrr