bbb bbg bbi bbl bbs bgb bgg bgi bgl bgs bi- bib big bii bil bis blb blg bli bll bls bsb bsg bsi bsl bss gbg gbi gbl gbs ggb ggg ggi ggs gib gig gii gil gis glb glg gli gll gls gsb gsg gsi gsl gss ibb ibg ibi ibl ibs igb igg igi igl igs iib iii iil iis il- ilb ilg ili ill ils is- isb isg isi isl iss lbb lbg lbi lbl lbs lgb lgg lgi lgl lgs lib lig lii lil lis llb llg lli lll lls lsb lsg lsi lsl lss sbb sbg sbi sbl sbs sgb sgg sgi sgl sgs sib sig sii sil sis slb slg sli sll sls ss- ssb ssg ssi ssl sss