-up b-p b-u bbb bbg bbp bbr bbu bgb bgg bgp bgr bgu bpb bpg bpp bpr bpu brb brg brp brr bru bub bug bup bur buu g-p gbg gbp gbr gbu ggb ggg ggp ggr ggu gpb gpg gpp gpr gpu grb grg grp grr gru gu- gub gug gup gur guu p-p pbb pbg pbp pbr pbu pgb pgg pgp pgr ppb ppg ppp ppr ppu prb prg prp prr pru pub pug pup pur puu rbb rbg rbp rbr rbu rgb rgg rgp rgr rpb rpg rpp rpr rpu rrb rrg rrp rrr rru rub rug rup rur ruu ubb ubg ubp ubr ubu ugb ugg ugp ugr ugu up- upb upg upp upr upu ur- urb urg urp urr uru uug uur uuu