-al -er a-a a-b a-c aaa aab aac aae aag aal aar ab- aba abb abc abe abg abl abr ac- aca acb acc ace acg acl acr aea aeb aec aee aeg ael aer ag- aga agb agc age agg agl agr al- ala alb alc ale alg all alr ar- ara arb arc are arg arl arr baa bab bac bae bag bal bar bba bbb bbc bbe bbg bbl bbr bca bcb bcc bce bcg bcl bcr be- bea beb bec bee beg bel ber bga bgb bgc bge bgg bgl bgr bla blb blc ble blg bll blr bra brb bre brg brl brr c-- caa cab cac cae cag cal car cba cbb cbc cbe cbg cbl cbr cca ccb ccc cce ccg ccl ccr ce- cea ceb cec cee ceg cel cer cga cgb cgc cge cgg cgl cgr cl- cla clb clc cle clg cll clr cra crb crc cre crg crl crr eaa eab eac eae eag eal ear eba ebb ebc ebe ebg ebl ebr ec- eca ecb ecc ece ecg ecl ecr eea eeb eec eee eeg eel eer ega egb egc ege egg egl egr ela elb elc ele elg ell elr era erb erc ere erg erl err gaa gab gac gae gag gal gar gba gbc gbe gbg gbl gbr gca gcb gcc gce gcg gcl gcr ge- gea geb gec gee geg gel ger gga ggb ggc ggg ggr gla glb glc gle glg gll glr gra grb grc gre grg grl grr la- laa lab lac lae lag lal lar lba lbb lbc lbe lbg lbl lbr lca lcb lcc lce lcg lcl lcr lea leb lec lee leg lel ler lga lgb lgc lge lgg lgl lgr lla llb llc lle llg lll llr lra lrb lrc lrg lrr ra- raa rab rac rae rag ral rar rba rbb rbc rbe rbg rbl rbr rca rcb rcc rce rcg rcl rcr re- rea reb rec ree reg rel rer rga rgb rgc rge rgg rgr rla rlc rle rlg rll rlr rra rrb rrc rrg rrl rrr