-ji a-a a-b a-i aaa aab aaf aai aaj aas ab- aba abb abf abi abj abs af- afa afb aff afi afj afs ai- aia aib aif aii ais aja ajb ajf aji ajj ajs as- asa asb asf asi asj ass baa bab baf bai baj bas bba bbb bbf bbi bbs bfa bfb bff bfi bfj bfs bi- bia bib bif bii bij bis bja bjf bji bjj bjs bsa bsb bsf bsi bsj bss faa fab faf fai faj fas fba fbb fbf fbi fbs ffa fff ffi ffs fia fib fif fii fij fis fja fjb fji fjs fsa fsb fsf fsi fsj fss i-f ia- iaa iab iaf iai ias iba ibb ibf ibi ibj ibs ifa ifb iff ifi ifs iia iib iif iii iij iis ija ijb ijf iji ijs is- isa isb isf isi isj iss j-i jaa jab jaf jai jaj jas jba jbf jbi jbj jbs jfa jfb jff jfi jfj jfs jia jib jif jii jij jis jja jjb jjf jjj jjs jsa jsb jsf jsi jsj jss saa sab saf sai saj sas sba sbb sbf sbi sbj sbs sfa sfb sff sfi sfj sfs sia sib sif sii sij sis sja sjb sjf sji sjj sjs ss- ssa ssb ssf ssi ssj sss