-up b-p b-u bbb bbg bbi bbp bbr bbt bbu bgb bgg bgi bgp bgr bgt bgu bi- bib big bii bip bir bit biu bpb bpg bpi bpp bpr bpt bpu brb brg bri brp brr brt bru btb btg bti btp btr btt btu bub bug bui bup bur but buu g-p gbg gbi gbp gbr gbt gbu ggb ggg ggi ggp ggr ggt ggu gib gig gii gip gir git giu gpb gpg gpi gpp gpr gpt gpu grb grg gri grp grr grt gru gtb gtg gti gtp gtr gtt gtu gu- gub gug gui gup gur gut guu ibb ibg ibi ibp ibr ibt ibu igb igg igi igp igr igt igu iib iii iip iir iit iiu ipb ipg ipi ipp ipr ipt ipu ir- irb irg iri irp irr irt iru itb itg iti itp itt itu iu- iub iug iui iup iur iut p-p pbb pbg pbi pbp pbr pbt pbu pgb pgg pgi pgp pgr pgt pib pig pii pip pir pit piu ppb ppg ppi ppp ppr ppt ppu prb prg pri prp prr prt pru pt- ptb ptg pti ptp ptr ptt ptu pub pug pui pup pur put puu rbb rbg rbi rbp rbr rbt rbu rgb rgg rgi rgp rgr rgt rib rig rii rip rir rit rpb rpg rpi rpp rpr rpt rpu rrb rrg rri rrp rrr rrt rru rtb rtg rti rtp rtr rtt rtu rub rug rui rup rur rut ruu tbb tbg tbi tbp tbr tbt tbu tgb tgg tgi tgp tgr tgt tgu tib tig tii tip tir tit tiu tpb tpg tpi tpp tpr tpt tpu trb trg tri trp trr trt tru ttb ttg tti ttp ttr ttt ttu tub tug tui tup tur tut tuu ubb ubg ubi ubp ubr ubt ubu ugb ugg ugi ugp ugr ugt ugu uib uig uii uip uir uit uiu up- upb upg upi upp upr upt upu ur- urb urg uri urp urr urt uru utb uti utp utr utt utu uug uur uut uuu