-ic b-p bbb bbc bbi bbn bbo bbp bbr bcb bcc bci bcn bco bcp bcr bi- bib bic bii bin bio bip bir bnb bnc bni bnn bno bnp bnr bob boc boi bon boo bop bor bpb bpc bpi bpn bpo bpp bpr brb bri brn bro brp brr c-- cbb cbc cbi cbn cbo cbp cbr ccb ccc cci ccn cco ccp ccr ci- cib cic cii cin cio cip cir cn- cnb cnc cni cnn cno cnp cnr co- cob coc coi con coo cop cor cpb cpc cpi cpn cpo cpp cpr crb crc cri crn cro crp crr ibb ibc ibi ibn ibo ibp ibr icb icc ici icn ico icp icr iib iic iii iin iio iip iir in- inb inc ini inn ino inp inr io- iob ioc ioi ion ioo iop ior ipb ipc ipi ipn ipo ipp ipr ir- irb irc iri irn iro irp irr n-i nbb nbc nbi nbn nbo nbp nbr ncb ncc nci ncn nco ncp ncr nib nic nii nin nio nip nir nnb nnc nni nnn nno nnp no- nob noc noi non noo nop nor npb npc npi npn npo npp npr nrb nrc nri nrn nro nrp nrr o-i ob- obb obc obi obn obo obp obr oc- ocb occ oci ocn oco ocp ocr oib oic oii oin oio oip oir on- onb onc oni onn ono onp onr oo- oob ooc ooi oon ooo oop oor op- opb opc opi opn opo opp opr or- orb orc ori orn oro orp orr p-p pbb pbc pbi pbn pbo pbp pbr pcb pcc pci pcn pco pcp pcr pib pic pii pin pio pip pir pn- pnb pnc pni pnn pno pnp pnr pob poc poi pon poo pop por ppb ppc ppi ppn ppo ppp ppr prb prc pri prn pro prp prr rbb rbc rbi rbn rbo rbp rbr rcb rcc rci rcn rco rcp rcr rib ric rii rin rio rip rir rnb rnc rni rnn rno rnp rnr rob roc roi ron roo rop ror rpb rpc rpi rpn rpo rpp rpr rrb rrc rri rrn rrp rrr