-up b-p b-u bbb bbh bbp bbr bbs bbu bhb bhh bhp bhr bhs bhu bpb bph bpp bpr bps bpu brb brh brp brr brs bru bsb bsh bsp bsr bss bsu bub buh bup bur bus buu hbb hbh hbp hbr hbs hbu hhb hhh hhp hhr hhs hhu hpb hph hpp hpr hps hpu hr- hrb hrh hrp hrr hrs hru hsb hsh hsp hsr hss hsu hub huh hup hur hus huu p-p pbb pbp pbr pbs pbu phb php phr phs phu ppb pph ppp ppr pps ppu prb prh prp prr prs pru ps- psb psh psp psr pss psu pub puh pup pur pus puu rbb rbh rbp rbr rbs rbu rh- rhb rhh rhp rhr rhs rhu rpb rph rpp rpr rps rpu rrb rrh rrp rrr rrs rru rsb rsh rsp rsr rss rsu rub ruh rup rur rus ruu sbb sbh sbp sbr sbs sbu sh- shb shh shp shr shs shu spb sph spp spr sps spu sr- srb srh srp srr srs ss- ssb ssh ssp ssr sss ssu sub suh sup sur sus suu ubb ubh ubp ubr ubs ubu uhb uhh uhp uhr uhs uhu up- upb uph upp upr ups upu ur- urb urp urr urs uru usb ush usp usr uss usu uur uus uuu