-al -er a-a a-b a-c aaa aab aac aae aag aah aal aar ab- aba abb abc abe abg abh abl abr ac- aca acb acc ace acg ach acl acr aea aeb aec aee aeg aeh ael aer ag- aga agb agc age agg agh agl agr aha ahb ahc ahe ahg ahh ahl ahr al- ala alb alc ale alg alh all alr ar- ara arb arc are arg arh arl arr baa bab bac bae bag bah bal bar bba bbb bbc bbe bbg bbh bbl bbr bca bcb bcc bce bcg bch bcl bcr be- bea beb bec bee beg beh bel ber bga bgb bgc bge bgg bgh bgl bgr bha bhb bhc bhe bhg bhh bhl bhr bla blb blc ble blg blh bll blr bra brb bre brg brh brl brr c-- caa cab cac cae cag cah cal car cba cbb cbc cbe cbg cbh cbl cbr cca ccb ccc cce ccg cch ccl ccr ce- cea ceb cec cee ceg ceh cel cer cga cgb cgc cge cgg cgh cgl cgr ch- cha chb chc che chg chh chl chr cl- cla clb clc cle clg clh cll clr cra crb crc cre crg crh crl crr eaa eab eac eae eag eah eal ear eba ebb ebc ebe ebg ebh ebl ebr ec- eca ecb ecc ece ecg ech ecl ecr eea eeb eec eee eeg eel eer ega egb egc ege egg egh egl egr eha ehb ehc ehe ehg ehh ehl ehr ela elb elc ele elg elh ell elr era erb erc ere erg erh erl err gaa gab gac gae gag gah gal gar gba gbc gbe gbg gbh gbl gbr gca gcb gcc gce gcg gch gcl gcr ge- gea geb gec gee geg geh gel ger gga ggb ggc ggg ggh ggr gha ghb ghc ghe ghg ghh ghl ghr gla glb glc gle glg glh gll glr gra grb grc gre grg grh grl grr haa hab hac hae hag hah hal har hba hbb hbc hbe hbg hbh hbl hbr hca hcb hcc hce hcg hch hcl hcr he- hea heb hec hee heg heh hel her hga hgb hgc hge hgg hgh hgl hgr hha hhb hhc hhe hhg hhh hhl hhr hla hlb hlc hle hlg hlh hll hlr hr- hra hrb hrc hre hrg hrh hrl hrr la- laa lab lac lae lag lah lal lar lba lbb lbc lbe lbg lbh lbl lbr lca lcb lcc lce lcg lch lcl lcr lea leb lec lee leg leh lel ler lga lgb lgc lge lgg lgh lgl lgr lha lhb lhc lhh lhr lla llb llc lle llg lll llr lra lrb lrc lrg lrh lrr ra- raa rab rac rae rag rah ral rar rba rbb rbc rbe rbg rbh rbl rbr rca rcb rcc rce rcg rch rcl rcr re- rea reb rec ree reg reh rel rer rga rgb rgc rge rgg rgh rgr rh- rha rhb rhc rhe rhg rhh rhl rhr rla rlc rle rlg rlh rll rlr rra rrb rrc rrg rrh rrl rrr