-al a-a a-b a-i aaa aab aae aaf aai aal aas ab- aba abb abe abf abi abl abs aea aeb aee aef aei ael aes af- afa afb afe aff afi afl afs ai- aia aib aie aif aii ail ais al- ala alb ale alf ali all als as- asa asb ase asf asi asl ass baa bab bae baf bai bal bas bba bbb bbe bbf bbi bbl bbs be- bea beb bee bef bei bel bes bfa bfb bfe bff bfi bfl bfs bi- bia bib bie bif bii bil bis bla blb ble blf bli bll bls bsa bsb bse bsf bsi bsl bss eaa eab eae eaf eai eal eas eba ebb ebe ebf ebi ebl ebs eea eeb eee eef eel ees ef- efa efb efe eff efi efl efs eia eib eie eif eii eil eis ela elb ele elf eli ell els es- esa esb ese esf esi esl ess faa fab fae faf fai fal fas fba fbb fbe fbf fbi fbl fbs fea feb fee fef fei fel fes ffa ffe fff ffi ffl ffs fia fib fie fif fii fil fis fla flb fle flf fli fll fls fsa fsb fse fsf fsi fsl fss i-f ia- iaa iab iae iaf iai ial ias iba ibb ibe ibf ibi ibl ibs ie- iea iee ief iei iel ies ifa ifb ife iff ifi ifl ifs iia iib iie iif iii iil iis il- ila ilb ile ilf ili ill ils is- isa isb ise isf isi isl iss la- laa lab lae laf lai lal las lba lbb lbe lbf lbi lbl lbs lea leb lee lef lei lel les lfa lfb lfe lff lfi lfl lfs lia lib lie lif lii lil lis lla llb lle llf lli lll lls lsa lsb lse lsf lsi lsl lss saa sab sae saf sai sal sas sba sbb sbe sbf sbi sbl sbs se- sea seb see sef sei sel ses sfa sfb sfe sff sfi sfl sfs sia sib sie sif sii sil sis sla slb sle slf sli sll sls ss- ssa ssb sse ssf ssi ssl sss