-ic b-u bbb bbc bbg bbi bbr bbu bcb bcc bcg bci bcr bcu bgb bgc bgg bgi bgr bgu bi- bib bic big bii bir biu brb brg bri brr bru bub buc bug bui bur buu c-- cbb cbc cbg cbi cbr cbu ccb ccc ccg cci ccr ccu cgb cgc cgg cgi cgr cgu ci- cib cic cig cii cir ciu crb crc crg cri crr cru cub cuc cug cui cur cuu gbc gbg gbi gbr gbu gcb gcc gcg gci gcr gcu ggb ggc ggg ggi ggr ggu gib gic gig gii gir giu grb grc grg gri grr gru gu- gub guc gug gui gur guu ibb ibc ibg ibi ibr ibu icb icc icg ici icr icu igb igc igg igi igr igu iib iic iii iir iiu ir- irb irc irg iri irr iru iu- iub iuc iug iui iur rbb rbc rbg rbi rbr rbu rcb rcc rcg rci rcr rcu rgb rgc rgg rgi rgr rib ric rig rii rir rrb rrc rrg rri rrr rru rub ruc rug rui rur ruu ubb ubc ubg ubi ubr ubu ucb ucc ucg uci ucr ucu ugb ugc ugg ugi ugr ugu uib uic uig uii uir uiu ur- urb urc urg uri urr uru uuc uug uur uuu