-al a-a a-b a-i aaa aab aad aaf aai aal ab- aba abb abd abf abi abl ad- ada adb add adf adi adl af- afa afb afd aff afi afl ai- aia aib aid aif aii ail al- ala alb ald alf ali all baa bab bad baf bai bal bba bbb bbd bbf bbi bbl bda bdb bdd bdf bdi bdl bfa bfb bfd bff bfi bfl bi- bia bib bid bif bii bil bla blb bld blf bli bll daa dab dad daf dai dal dba dbb dbd dbf dbi dbl dda ddb ddd ddf ddi ddl dfa dfb dfd dff dfi dfl di- dia dib did dif dii dil dl- dla dlb dld dlf dli dll faa fab fad faf fai fal fba fbb fbd fbf fbi fbl fda fdb fdd fdf fdi fdl ffa ffd fff ffi ffl fia fib fid fif fii fil fla flb fld flf fli fll i-d i-f ia- iaa iab iad iaf iai ial iba ibb ibd ibf ibi ibl ida idb idd idf idi idl ifa ifb ifd iff ifi ifl iia iib iid iif iii iil il- ila ilb ild ilf ili ill la- laa lab lad laf lai lal lba lbb lbd lbf lbi lbl lda ldb ldd ldf ldi ldl lfa lfb lfd lff lfi lfl lia lib lid lif lii lil lla llb lld llf lli lll