-ic b-p bbb bbc bbe bbi bbo bbp bbs bbt bcb bcc bce bci bco bcp bcs bct be- beb bec bee bei beo bep bes bet bi- bib bic bie bii bio bip bis bit bob boc boe boi boo bop bos bot bpb bpc bpe bpi bpo bpp bps bpt bsb bsc bse bsi bso bsp bss bst btb btc bte bti bto btp bts btt c-- cbb cbc cbe cbi cbo cbp cbs cbt ccb ccc cce cci cco ccp ccs cct ce- ceb cec cee cei ceo cep ces cet ci- cib cic cie cii cio cip cis cit co- cob coc coe coi coo cop cos cot cpb cpc cpe cpi cpo cpp cps cpt csb csc cse csi cso csp css cst ctb ctc cte cti cto ctp cts ctt ebb ebc ebe ebi ebo ebp ebs ebt ec- ecb ecc ece eci eco ecs ect eeb eec eee eeo eep ees eet eib eic eie eii eio eip eis eit eo- eob eoc eoe eoi eoo eop eos eot ep- epb epc epe epi epo epp eps ept es- esb esc ese esi eso esp ess est etb etc ete eti eto etp ets ett ibb ibc ibe ibi ibo ibp ibs ibt icb icc ice ici ico icp ics ict ie- iec iee iei iep ies iet iib iic iie iii iio iip iis iit io- iob ioc ioe ioi ioo iop ios iot ipb ipc ipe ipi ipo ipp ips ipt is- isb isc ise isi iso isp iss ist itb itc ite iti ito itp its itt o-i ob- obb obc obe obi obo obp obs obt oc- ocb occ oci oco ocp ocs oct oeb oec oee oei oeo oep oes oet oib oic oie oii oio oip ois oit oo- oob ooc ooi ooo oop oos oot op- opb opc ope opi opo opp ops opt os- osb osc ose osi oso osp oss ost ot- otb otc ote oti oto otp ots ott p-p pbb pbc pbe pbi pbo pbp pbs pbt pcb pcc pce pci pco pcp pcs pct peb pec pee pei peo pep pes pet pib pic pie pii pio pip pis pit pob poc poe poi poo pop pos pot ppb ppc ppe ppi ppo ppp pps ppt ps- psb psc pse psi pso psp pss pst pt- ptb ptc pte pti pto ptp pts ptt sbb sbc sbe sbi sbo sbp sbs sbt scb scc sce sci sco scp scs sct se- seb sec see sei seo sep ses set sib sic sie sii sio sip sis sit sob soc soe soi soo sop sos sot spb spc spe spi spo spp sps spt ss- ssb ssc sse ssi sso ssp sss sst stb stc ste sti sto stp sts stt tbb tbc tbe tbi tbo tbp tbs tbt tcb tcc tce tci tco tcp tcs tct te- teb tec tee tei teo tep tes tet tib tic tie tii tio tip tis tit to- tob toc toe toi too top tos tot tpb tpc tpe tpi tpo tpp tps tpt tsb tsc tse tsi tso tsp tss tst ttb ttc tte tti tto ttp tts ttt