-ic bbb bbc bbe bbi bbm bbn bcb bcc bce bci bcm bcn be- beb bec bee bei bem ben bi- bib bic bie bii bim bin bmb bmc bme bmi bmm bmn bnb bnc bne bni bnn c-- cbb cbc cbe cbi cbm cbn ccb ccc cce cci ccm ccn ce- ceb cec cee cei cem cen ci- cib cic cie cii cim cin cmb cmc cme cmi cmm cmn cn- cnb cnc cne cni cnm cnn ebb ebc ebe ebi ebm ebn ec- ecb ecc ece eci ecm ecn eeb eec eee eem een eib eic eie eii eim ein em- emb emc eme emi emm emn en- enb enc ene eni enm enn ibb ibc ibe ibi ibm ibn icb icc ice ici icm icn ie- iec iee iei iem ien iib iic iie iii iim iin im- imb imc ime imi imm imn in- inb inc ine ini inm inn mbb mbc mbe mbi mbm mc- mcb mcc mce mci mcm mcn meb mec mee mei mem men mi- mib mic mie mii mim min mmb mmc mme mmi mmm mmn mnb mnc mne mni mnm mnn n-i nbb nbc nbe nbi nbm nbn ncb ncc nce nci ncm ncn ne- neb nec nee nei nem nen nib nic nie nii nim nin nmb nmc nme nmi nmm nmn nnb nnc nne nni nnm nnn