-al a-a a-b aaa aab aae aal aas ab- aba abb abe abl abs aea aeb aee ael aes al- ala alb ale all als as- asa asb ase asl ass baa bab bae bal bas bba bbb bbe bbl bbs be- bea beb bee bel bes bla blb ble bll bls bsa bsb bse bsl bss eaa eab eae eal eas eba ebb ebe ebl ebs eea eeb eee eel ees ela elb ele ell els es- esa esb ese esl ess la- laa lab lae lal las lba lbb lbe lbl lbs lea leb lee lel les lla llb lle lll lls lsa lsb lse lsl lss saa sab sae sal sas sba sbb sbe sbl sbs se- sea seb see sel ses sla slb sle sll sls ss- ssa ssb sse ssl sss