-ic bbb bbc bbe bbi bbm bbn bbo bcb bcc bce bci bcm bcn bco be- beb bec bee bei bem ben beo bi- bib bic bie bii bim bin bio bmb bmc bme bmi bmm bmn bmo bnb bnc bne bni bnn bno bob boc boe boi bom bon boo c-- cbb cbc cbe cbi cbm cbn cbo ccb ccc cce cci ccm ccn cco ce- ceb cec cee cei cem cen ceo ci- cib cic cie cii cim cin cio cmb cmc cme cmi cmm cmn cmo cn- cnb cnc cne cni cnm cnn cno co- cob coc coe coi com con coo ebb ebc ebe ebi ebm ebn ebo ec- ecb ecc ece eci ecm ecn eco eeb eec eee eem een eeo eib eic eie eii eim ein eio em- emb emc eme emi emm emn emo en- enb enc ene eni enm enn eno eo- eob eoc eoe eoi eom eon eoo ibb ibc ibe ibi ibm ibn ibo icb icc ice ici icm icn ico ie- iec iee iei iem ien iib iic iie iii iim iin iio im- imb imc ime imi imm imn imo in- inb inc ine ini inm inn ino io- iob ioc ioe ioi iom ion ioo m-o mbb mbc mbe mbi mbm mbo mc- mcb mcc mce mci mcm mcn mco meb mec mee mei mem men meo mi- mib mic mie mii mim min mio mmb mmc mme mmi mmm mmn mmo mnb mnc mne mni mnm mnn mno mob moc moe moi mom mon moo n-i nbb nbc nbe nbi nbm nbn nbo ncb ncc nce nci ncm ncn nco ne- neb nec nee nei nem nen neo nib nic nie nii nim nin nio nmb nmc nme nmi nmm nmn nmo nnb nnc nne nni nnm nnn nno no- nob noc noe noi nom non noo o-i ob- obb obc obe obi obm obn obo oc- ocb occ oci ocm ocn oco oeb oec oee oei oem oen oeo oib oic oie oii oim oin oio om- omb omc ome omi omm omn omo on- onb onc one oni onn ono oo- oob ooc ooi oom oon ooo