-ic b-p bbb bbc bbe bbi bbo bbp bbs bbx bcb bcc bce bci bco bcp bcs bcx be- beb bec bee bei beo bep bes bex bi- bib bic bie bii bio bip bis bix bob boc boe boi boo bop bos box bpb bpc bpe bpi bpo bpp bps bpx bsb bsc bse bsi bso bsp bss bsx bxb bxi bxo bxx c-- cbb cbc cbe cbi cbo cbp cbs cbx ccb ccc cce cci cco ccp ccs ccx ce- ceb cec cee cei ceo cep ces cex ci- cib cic cie cii cio cip cis cix co- cob coc coe coi coo cop cos cox cpb cpc cpe cpi cpo cpp cps cpx csb csc cse csi cso csp css csx cxc cxi cxo cxp cxs cxx ebb ebc ebe ebi ebo ebp ebs ebx ec- ecb ecc ece eci eco ecs ecx eeb eec eee eeo eep ees eex eib eic eie eii eio eip eis eix eo- eob eoc eoe eoi eoo eop eos ep- epb epc epe epi epo epp eps epx es- esb esc ese esi eso esp ess esx ex- exc exe exi exo exp exs exx ibb ibc ibe ibi ibo ibp ibs ibx icb icc ice ici ico icp ics ie- iec iee iei iep ies iex iib iic iie iii iio iip iis iix io- iob ioc ioe ioi ioo iop ios ipb ipc ipe ipi ipo ipp ips ipx is- isb isc ise isi iso isp iss ixc ixe ixi o-i ob- obb obc obe obi obo obp obs obx oc- ocb occ oci oco ocp ocs ocx oeb oec oee oei oeo oep oes oex oib oic oie oii oio oip ois oo- oob ooc ooi ooo oop oos oox op- opb opc ope opi opo opp ops opx os- osb osc ose osi oso osp oss osx ox- oxb oxc oxi oxo oxx p-p pbb pbc pbe pbi pbo pbp pbs pbx pcb pcc pce pci pco pcp pcs pcx peb pec pee pei peo pep pes pex pib pic pie pii pio pip pis pix pob poc poe poi poo pop pos pox ppb ppc ppe ppi ppo ppp pps ppx ps- psb psc pse psi pso psp pss psx pxc pxe pxs sbb sbc sbe sbi sbo sbp sbs sbx scb scc sce sci sco scp scs scx se- seb sec see sei seo sep ses sex sib sic sie sii sio sip sis six sob soc soe soi soo sop sos sox spb spc spe spi spo spp sps spx ss- ssb ssc sse ssi sso ssp sss ssx sxc sxi sxs xbc xbe xbx xcb xci xcp xcx xee xep xes xex xic xie xii xio xis xix xoc xoi xoo xop xos xox xpb xpc xpe xpo xpp xps xsb xsc xsi xsp xss xxi xxo xxp xxx