-al a-a a-b a-i aaa aab aae aag aai aal aas ab- aba abb abe abg abi abl abs aea aeb aee aeg aei ael aes ag- aga agb age agg agi agl ags ai- aia aib aie aig aii ail ais al- ala alb ale alg ali all als as- asa asb ase asg asi asl ass baa bab bae bag bai bal bas bba bbb bbe bbg bbi bbl bbs be- bea beb bee beg bei bel bes bga bgb bge bgg bgi bgl bgs bi- bia bib bie big bii bil bis bla blb ble blg bli bll bls bsa bsb bse bsg bsi bsl bss eaa eab eae eag eai eal eas eba ebb ebe ebg ebi ebl ebs eea eeb eee eeg eel ees ega egb ege egg egi egl egs eia eib eie eig eii eil eis ela elb ele elg eli ell els es- esa esb ese esg esi esl ess gaa gab gae gag gai gal gas gba gbe gbg gbi gbl gbs ge- gea geb gee geg gei gel ges gga ggb ggg ggi ggs gia gib gie gig gii gil gis gla glb gle glg gli gll gls gsa gsb gse gsg gsi gsl gss ia- iaa iab iae iag iai ial ias iba ibb ibe ibg ibi ibl ibs ie- iea iee ieg iei iel ies iga igb ige igg igi igl igs iia iib iie iii iil iis il- ila ilb ile ilg ili ill ils is- isa isb ise isg isi isl iss la- laa lab lae lag lai lal las lba lbb lbe lbg lbi lbl lbs lea leb lee leg lei lel les lga lgb lge lgg lgi lgl lgs lia lib lie lig lii lil lis lla llb lle llg lli lll lls lsa lsb lse lsg lsi lsl lss saa sab sae sag sai sal sas sba sbb sbe sbg sbi sbl sbs se- sea seb see seg sei sel ses sga sgb sge sgg sgi sgl sgs sia sib sie sig sii sil sis sla slb sle slg sli sll sls ss- ssa ssb sse ssg ssi ssl sss