-ic b-p bbb bbc bbe bbf bbi bbo bbp bbs bcb bcc bce bcf bci bco bcp bcs be- beb bec bee bef bei beo bep bes bfb bfc bfe bff bfi bfo bfp bfs bi- bib bic bie bif bii bio bip bis bob boc boe bof boi boo bop bos bpb bpc bpe bpf bpi bpo bpp bps bsb bsc bse bsf bsi bso bsp bss c-- cbb cbc cbe cbf cbi cbo cbp cbs ccb ccc cce ccf cci cco ccp ccs ce- ceb cec cee cef cei ceo cep ces cfb cfc cfe cff cfi cfo cfp cfs ci- cib cic cie cif cii cio cip cis co- cob coc coe cof coi coo cop cos cpb cpc cpe cpf cpi cpo cpp cps csb csc cse csf csi cso csp css ebb ebc ebe ebf ebi ebo ebp ebs ec- ecb ecc ece ecf eci eco ecs eeb eec eee eef eeo eep ees ef- efb efc efe eff efi efo efp efs eib eic eie eif eii eio eip eis eo- eob eoc eoe eof eoi eoo eop eos ep- epb epc epe epf epi epo epp eps es- esb esc ese esf esi eso esp ess fbb fbc fbe fbf fbi fbo fbp fbs fcb fcc fce fcf fci fco fcp fcs feb fec fee fef fei feo fep fes ffc ffe fff ffi ffo ffp ffs fib fic fie fif fii fip fis fob foc foe fof foi foo fop fos fpb fpc fpe fpi fpo fpp fps fsb fsc fse fsf fsi fso fsp fss i-f ibb ibc ibe ibf ibi ibo ibp ibs icb icc ice icf ici ico icp ics ie- iec iee ief iei iep ies ifb ifc ife iff ifi ifo ifp ifs iib iic iie iif iii iio iip iis io- iob ioc ioe iof ioi ioo iop ios ipb ipc ipe ipf ipi ipo ipp ips is- isb isc ise isf isi iso isp iss o-i ob- obb obc obe obf obi obo obp obs oc- ocb occ ocf oci oco ocp ocs oeb oec oee oef oei oeo oep oes of- ofb ofc ofe off ofi ofo ofp ofs oib oic oie oif oii oio oip ois oo- oob ooc oof ooi ooo oop oos op- opb opc ope opf opi opo opp ops os- osb osc ose osf osi oso osp oss p-p pbb pbc pbe pbf pbi pbo pbp pbs pcb pcc pce pcf pci pco pcp pcs peb pec pee pef pei peo pep pes pfb pfc pfe pff pfi pfo pfp pfs pib pic pie pif pii pio pip pis pob poc poe pof poi poo pop pos ppb ppc ppe ppf ppi ppo ppp pps ps- psb psc pse psf psi pso psp pss sbb sbc sbe sbf sbi sbo sbp sbs scb scc sce scf sci sco scp scs se- seb sec see sef sei seo sep ses sfb sfc sfe sff sfi sfo sfp sfs sib sic sie sif sii sio sip sis sob soc soe sof soi soo sop sos spb spc spe spf spi spo spp sps ss- ssb ssc sse ssf ssi sso ssp sss