c-- ccc ccd ccn ccr ccu cdc cdd cdn cdr cdu cn- cnc cnd cnn cnr cnu crc crd crn crr cru cuc cud cun cur cuu dcc dcd dcn dcr dcu ddc ddd ddn ddr ddu dnc dnd dnn dnr drc drd drn drr dru duc dud dun dur ncc ncd ncn ncr ncu ndc ndd ndn ndr ndu nnc nnn nnu nrc nrd nrn nrr nru nuc nud nun nur nuu rcc rcd rcn rcr rcu rdc rdd rdn rdr rdu rnc rnd rnn rnr rnu rrc rrd rrn rrr rru ruc rud run rur ruu ucc ucd ucn ucr ucu udc udd udn udr udu un- unc und unn unr unu ur- urc urd urn urr uru uuc uun uur uuu