-ic b-p bbb bbc bbe bbi bbn bbo bbp bcb bcc bce bci bcn bco bcp be- beb bec bee bei ben beo bep bi- bib bic bie bii bin bio bip bnb bnc bne bni bnn bno bnp bob boc boe boi bon boo bop bpb bpc bpe bpi bpn bpo bpp c-- cbb cbc cbe cbi cbn cbo cbp ccb ccc cce cci ccn cco ccp ce- ceb cec cee cei cen ceo cep ci- cib cic cie cii cin cio cip cn- cnb cnc cne cni cnn cno cnp co- cob coc coe coi con coo cop cpb cpc cpe cpi cpn cpo cpp ebb ebc ebe ebi ebn ebo ebp ec- ecb ecc ece eci ecn eco eeb eec eee een eeo eep eib eic eie eii ein eio eip en- enb enc ene eni enn eno enp eo- eob eoc eoe eoi eon eoo eop ep- epb epc epe epi epn epo epp ibb ibc ibe ibi ibn ibo ibp icb icc ice ici icn ico icp ie- iec iee iei ien iep iib iic iie iii iin iio iip in- inb inc ine ini inn ino inp io- iob ioc ioe ioi ion ioo iop ipb ipc ipe ipi ipn ipo ipp n-i nbb nbc nbe nbi nbn nbo nbp ncb ncc nce nci ncn nco ncp ne- neb nec nee nei nen neo nep nib nic nie nii nin nio nip nnb nnc nne nni nnn nno nnp no- nob noc noe noi non noo nop npb npc npe npi npn npo npp o-i ob- obb obc obe obi obn obo obp oc- ocb occ oci ocn oco ocp oeb oec oee oei oen oeo oep oib oic oie oii oin oio oip on- onb onc one oni onn ono onp oo- oob ooc ooi oon ooo oop op- opb opc ope opi opn opo opp p-p pbb pbc pbe pbi pbn pbo pbp pcb pcc pce pci pcn pco pcp peb pec pee pei pen peo pep pib pic pie pii pin pio pip pn- pnb pnc pne pni pnn pno pnp pob poc poe poi pon poo pop ppb ppc ppe ppi ppn ppo ppp