bbb bbc bbm bbn bbs bcb bcc bcm bcn bcs bmb bmc bmm bmn bms bnb bnc bnn bns bsb bsc bsm bsn bss c-- cbb cbc cbm cbn cbs ccb ccc ccm ccn ccs cmb cmc cmm cmn cms cn- cnb cnc cnm cnn cns csb csc csm csn css mbb mbc mbm mbs mc- mcb mcc mcm mcn mcs mmb mmc mmm mmn mms mnb mnc mnm mnn mns msb msc msm msn mss nbb nbc nbm nbn nbs ncb ncc ncm ncn ncs nmb nmc nmm nmn nms nnb nnc nnm nnn nns nsb nsc nsm nsn nss sbb sbc sbm sbn sbs scb scc scm scn scs smb smc smm smn sms snb snc snm snn sns ss- ssb ssc ssm ssn sss