b-p bbb bbg bbi bbp bbs bbt bgb bgg bgi bgp bgs bgt bi- bib big bii bip bis bit bpb bpg bpi bpp bps bpt bsb bsg bsi bsp bss bst btb btg bti btp bts btt g-p gbg gbi gbp gbs gbt ggb ggg ggi ggp ggs ggt gib gig gii gip gis git gpb gpg gpi gpp gps gpt gsb gsg gsi gsp gss gst gtb gtg gti gtp gts gtt ibb ibg ibi ibp ibs ibt igb igg igi igp igs igt iib iii iip iis iit ipb ipg ipi ipp ips ipt is- isb isg isi isp iss ist itb itg iti itp its itt p-p pbb pbg pbi pbp pbs pbt pgb pgg pgi pgp pgs pgt pib pig pii pip pis pit ppb ppg ppi ppp pps ppt ps- psb psg psi psp pss pst pt- ptb ptg pti ptp pts ptt sbb sbg sbi sbp sbs sbt sgb sgg sgi sgp sgs sgt sib sig sii sip sis sit spb spg spi spp sps spt ss- ssb ssg ssi ssp sss sst stb stg sti stp sts stt tbb tbg tbi tbp tbs tbt tgb tgg tgi tgp tgs tgt tib tig tii tip tis tit tpb tpg tpi tpp tps tpt tsb tsg tsi tsp tss tst ttb ttg tti ttp tts ttt