-ic bbb bbc bbi bbm bbn bbo bbs bcb bcc bci bcm bcn bco bcs bi- bib bic bii bim bin bio bis bmb bmc bmi bmm bmn bmo bms bnb bnc bni bnn bno bns bob boc boi bom bon boo bos bsb bsc bsi bsm bsn bso bss c-- cbb cbc cbi cbm cbn cbo cbs ccb ccc cci ccm ccn cco ccs ci- cib cic cii cim cin cio cis cmb cmc cmi cmm cmn cmo cms cn- cnb cnc cni cnm cnn cno cns co- cob coc coi com con coo cos csb csc csi csm csn cso css ibb ibc ibi ibm ibn ibo ibs icb icc ici icm icn ico ics iib iic iii iim iin iio iis im- imb imc imi imm imn imo ims in- inb inc ini inm inn ino ins io- iob ioc ioi iom ion ioo ios is- isb isc isi ism isn iso iss m-o mbb mbc mbi mbm mbo mbs mc- mcb mcc mci mcm mcn mco mcs mi- mib mic mii mim min mio mis mmb mmc mmi mmm mmn mmo mms mnb mnc mni mnm mnn mno mns mob moc moi mom mon moo mos msb msc msi msm msn mso mss n-i nbb nbc nbi nbm nbn nbo nbs ncb ncc nci ncm ncn nco ncs nib nic nii nim nin nio nis nmb nmc nmi nmm nmn nmo nms nnb nnc nni nnm nnn nno nns no- nob noc noi nom non noo nos nsb nsc nsi nsm nsn nso nss o-i ob- obb obc obi obm obn obo obs oc- ocb occ oci ocm ocn oco ocs oib oic oii oim oin oio ois om- omb omc omi omm omn omo oms on- onb onc oni onn ono ons oo- oob ooc ooi oom oon ooo oos os- osb osc osi osm osn oso oss sbb sbc sbi sbm sbn sbo sbs scb scc sci scm scn sco scs sib sic sii sim sin sio sis smb smc smi smm smn smo sms snb snc sni snm snn sno sns sob soc soi som son soo sos ss- ssb ssc ssi ssm ssn sso sss