-ic bbb bbc bbi bbm bbr bbs bcb bcc bci bcm bcr bcs bi- bib bic bii bim bir bis bmb bmc bmi bmm bmr bms brb bri brm brr brs bsb bsc bsi bsm bsr bss c-- cbb cbc cbi cbm cbr cbs ccb ccc cci ccm ccr ccs ci- cib cic cii cim cir cis cmb cmc cmi cmm cmr cms crb crc cri crm crr crs csb csc csi csm csr css ibb ibc ibi ibm ibr ibs icb icc ici icm icr ics iib iic iii iim iir iis im- imb imc imi imm ims ir- irb irc iri irm irr irs is- isb isc isi ism isr iss m-r mbb mbc mbi mbm mbr mbs mc- mcb mcc mci mcm mcr mcs mi- mib mic mii mim mir mis mmb mmc mmi mmm mmr mms mrb mrc mri mrm mrr mrs msb msc msi msm msr mss rbb rbc rbi rbm rbr rbs rcb rcc rci rcm rcr rcs rib ric rii rim rir ris rmb rmc rmi rmm rmr rms rrb rrc rri rrm rrr rrs rsb rsc rsi rsm rsr rss sbb sbc sbi sbm sbr sbs scb scc sci scm scr scs sib sic sii sim sir sis smb smc smi smm smr sms sr- srb src sri srm srr srs ss- ssb ssc ssi ssm ssr sss