-al a-a a-b a-c aaa aab aac aal aam aar ab- aba abb abc abl abm abr ac- aca acb acc acl acm acr al- ala alb alc all alm alr ama amb amc aml amm amr ar- ara arb arc arl arm arr baa bab bac bal bam bar bba bbb bbc bbl bbm bbr bca bcb bcc bcl bcm bcr bla blb blc bll blm blr bma bmb bmc bml bmm bmr bra brb brl brm brr c-- caa cab cac cal cam car cba cbb cbc cbl cbm cbr cca ccb ccc ccl ccm ccr cl- cla clb clc cll clm clr cma cmb cmc cml cmm cmr cra crb crc crl crm crr la- laa lab lac lal lam lar lba lbb lbc lbl lbm lbr lca lcb lcc lcl lcm lcr lla llb llc lll llm llr lma lmb lmc lml lmm lmr lra lrb lrc lrm lrr m-r maa mab mac mal mam mar mba mbb mbc mbl mbm mbr mc- mca mcb mcc mcl mcm mcr mla mlb mlc mll mlm mlr mma mmb mmc mml mmm mmr mra mrb mrc mrl mrm mrr ra- raa rab rac ral ram rar rba rbb rbc rbl rbm rbr rca rcb rcc rcl rcm rcr rla rlc rll rlm rlr rma rmb rmc rml rmm rmr rra rrb rrc rrl rrm rrr