-er -ic b-p bbb bbc bbe bbi bbm bbn bbo bbp bbr bcb bcc bce bci bcm bcn bco bcp bcr be- beb bec bee bei bem ben beo bep ber bi- bib bic bie bii bim bin bio bip bir bmb bmc bme bmi bmm bmn bmo bmp bmr bnb bnc bne bni bnn bno bnp bnr bob boc boe boi bom bon boo bop bor bpb bpc bpe bpi bpm bpn bpo bpp bpr brb bre bri brm brn bro brp brr c-- cbb cbc cbe cbi cbm cbn cbo cbp cbr ccb ccc cce cci ccm ccn cco ccp ccr ce- ceb cec cee cei cem cen ceo cep cer ci- cib cic cie cii cim cin cio cip cir cmb cmc cme cmi cmm cmn cmo cmp cmr cn- cnb cnc cne cni cnm cnn cno cnp cnr co- cob coc coe coi com con coo cop cor cpb cpc cpe cpi cpm cpn cpo cpp cpr crb crc cre cri crm crn cro crp crr ebb ebc ebe ebi ebm ebn ebo ebp ebr ec- ecb ecc ece eci ecm ecn eco ecr eeb eec eee eem een eeo eep eer eib eic eie eii eim ein eio eip eir em- emb emc eme emi emm emn emo emp emr en- enb enc ene eni enm enn eno enp enr eo- eob eoc eoe eoi eom eon eoo eop eor ep- epb epc epe epi epm epn epo epp epr erb erc ere eri erm ern ero erp err ibb ibc ibe ibi ibm ibn ibo ibp ibr icb icc ice ici icm icn ico icp icr ie- iec iee iei iem ien iep ier iib iic iie iii iim iin iio iip iir im- imb imc ime imi imm imn imo imp in- inb inc ine ini inm inn ino inp inr io- iob ioc ioe ioi iom ion ioo iop ior ipb ipc ipe ipi ipm ipn ipo ipp ipr ir- irb irc ire iri irm irn iro irp irr m-o m-r mbb mbc mbe mbi mbm mbo mbp mbr mc- mcb mcc mce mci mcm mcn mco mcp mcr meb mec mee mei mem men meo mep mer mi- mib mic mie mii mim min mio mip mir mmb mmc mme mmi mmm mmn mmo mmp mmr mnb mnc mne mni mnm mnn mno mnp mnr mob moc moe moi mom mon moo mop mor mpb mpc mpe mpi mpm mpn mpo mpp mpr mrb mrc mre mri mrm mrn mro mrp mrr n-i nbb nbc nbe nbi nbm nbn nbo nbp nbr ncb ncc nce nci ncm ncn nco ncp ncr ne- neb nec nee nei nem nen neo nep ner nib nic nie nii nim nin nio nip nir nmb nmc nme nmi nmm nmn nmo nmp nmr nnb nnc nne nni nnm nnn nno nnp no- nob noc noe noi nom non noo nop nor npb npc npe npi npm npn npo npp npr nrb nrc nre nri nrm nrn nro nrp nrr o-i ob- obb obc obe obi obm obn obo obp obr oc- ocb occ oci ocm ocn oco ocp ocr oeb oec oee oei oem oen oeo oep oer oib oic oie oii oim oin oio oip oir om- omb omc ome omi omm omn omo omp omr on- onb onc one oni onn ono onp onr oo- oob ooc ooi oom oon ooo oop oor op- opb opc ope opi opm opn opo opp opr or- orb orc ore ori orm orn oro orp orr p-p pbb pbc pbe pbi pbm pbn pbo pbp pbr pcb pcc pce pci pcm pcn pco pcp pcr peb pec pee pei pem pen peo pep per pib pic pie pii pim pin pio pip pir pmb pmc pme pmi pmm pmn pmo pmp pmr pn- pnb pnc pne pni pnm pnn pno pnp pnr pob poc poe poi pom pon poo pop por ppb ppc ppe ppi ppm ppn ppo ppp ppr prb prc pre pri prm prn pro prp prr rbb rbc rbe rbi rbm rbn rbo rbp rbr rcb rcc rce rci rcm rcn rco rcp rcr re- reb rec ree rei rem ren reo rep rer rib ric rie rii rim rin rio rip rir rmb rmc rme rmi rmm rmn rmo rmp rmr rnb rnc rni rnm rnn rno rnp rnr rob roc roe roi rom ron roo rop ror rpb rpc rpe rpi rpm rpn rpo rpp rpr rrb rrc rri rrm rrn rrp rrr