-al a-a a-b a-c aaa aab aac aae aal aam ab- aba abb abc abe abl abm ac- aca acb acc ace acl acm aea aeb aec aee ael aem al- ala alb alc ale all alm ama amb amc ame aml amm baa bab bac bae bal bam bba bbb bbc bbe bbl bbm bca bcb bcc bce bcl bcm be- bea beb bec bee bel bem bla blb blc ble bll blm bma bmb bmc bme bml bmm c-- caa cab cac cae cal cam cba cbb cbc cbe cbl cbm cca ccb ccc cce ccl ccm ce- cea ceb cec cee cel cem cl- cla clb clc cle cll clm cma cmb cmc cme cml cmm eaa eab eac eae eal eam eba ebb ebc ebe ebl ebm ec- eca ecb ecc ece ecl ecm eea eeb eec eee eel eem ela elb elc ele ell elm em- ema emb emc eme eml emm la- laa lab lac lae lal lam lba lbb lbc lbe lbl lbm lca lcb lcc lce lcl lcm lea leb lec lee lel lem lla llb llc lle lll llm lma lmb lmc lme lml lmm maa mab mac mae mal mam mba mbb mbc mbe mbl mbm mc- mca mcb mcc mce mcl mcm mea meb mec mee mel mem mla mlb mlc mle mll mlm mma mmb mmc mme mml mmm