bbb bbi bbm bbn bbs bi- bib bii bim bin bis bmb bmi bmm bmn bms bnb bni bnn bns bsb bsi bsm bsn bss ibb ibi ibm ibn ibs iib iii iim iin iis im- imb imi imm imn ims in- inb ini inm inn ins is- isb isi ism isn iss mbb mbi mbm mbs mi- mib mii mim min mis mmb mmi mmm mmn mms mnb mni mnm mnn mns msb msi msm msn mss n-i nbb nbi nbm nbn nbs nib nii nim nin nis nmb nmi nmm nmn nms nnb nni nnm nnn nns nsb nsi nsm nsn nss sbb sbi sbm sbn sbs sib sii sim sin sis smb smi smm smn sms snb sni snm snn sns ss- ssb ssi ssm ssn sss