-ic bbb bbc bbe bbi bbk bbm bbn bcb bcc bce bci bck bcm bcn be- beb bec bee bei bek bem ben bi- bib bic bie bii bik bim bin bkb bkc bke bkk bkm bkn bmb bmc bme bmi bmk bmm bmn bnb bnc bne bni bnk bnn c-- cbb cbc cbe cbi cbk cbm cbn ccb ccc cce cci cck ccm ccn ce- ceb cec cee cei cek cem cen ci- cib cic cie cii cik cim cin ckb ckc cki ckm cmb cmc cme cmi cmk cmm cmn cn- cnb cnc cne cni cnm cnn ebb ebc ebe ebi ebk ebm ebn ec- ecb ecc ece eci eck ecm ecn eeb eec eee eek eem een eib eic eie eii eik eim ein ekb ekc eke eki em- emb emc eme emi emk emm emn en- enb enc ene eni enk enm enn ibb ibc ibe ibi ibk ibm ibn icb icc ice ici ick icm icn ie- iec iee iei iek iem ien iib iic iie iii iim iin ikb ikc ike iki ikk im- imb imc ime imi imm imn in- inb inc ine ini ink inm inn kbb kbc kbe kbi kbk kbm kbn kcb kcc kce kci kck kcm kcn ke- keb kec kee kei kek kem ken kib kic kie kii kik kim kin kkb kkc kke kki kkk kkm kkn kmb kmc kme kmi kmk kmm kn- knc kne kni knk knm knn mbb mbc mbe mbi mbk mbm mc- mcb mcc mce mci mck mcm mcn meb mec mee mei mek mem men mi- mib mic mie mii mik mim min mkb mkc mke mkk mkm mkn mmb mmc mme mmi mmk mmm mmn mnb mnc mne mni mnk mnm mnn n-i nbb nbc nbe nbi nbk nbm nbn ncb ncc nce nci nck ncm ncn ne- neb nec nee nei nek nem nen nib nic nie nii nik nim nin nkc nke nki nkk nkm nkn nmb nmc nme nmi nmk nmm nmn nnb nnc nne nni nnk nnm nnn