-ic b-p bbb bbc bbi bbo bbp bbs bcb bcc bci bco bcp bcs bi- bib bic bii bio bip bis bob boc boi boo bop bos bpb bpc bpi bpo bpp bps bsb bsc bsi bso bsp bss c-- cbb cbc cbi cbo cbp cbs ccb ccc cci cco ccp ccs ci- cib cic cii cio cip cis co- cob coc coi coo cop cos cpb cpc cpi cpo cpp cps csb csc csi cso csp css ibb ibc ibi ibo ibp ibs icb icc ici ico icp ics iib iic iii iio iip iis io- iob ioc ioi ioo iop ios ipb ipc ipi ipo ipp ips is- isb isc isi iso isp iss o-i ob- obb obc obi obo obp obs oc- ocb occ oci oco ocp ocs oib oic oii oio oip ois oo- oob ooc ooi ooo oop oos op- opb opc opi opo opp ops os- osb osc osi oso osp oss p-p pbb pbc pbi pbo pbp pbs pcb pcc pci pco pcp pcs pib pic pii pio pip pis pob poc poi poo pop pos ppb ppc ppi ppo ppp pps ps- psb psc psi pso psp pss sbb sbc sbi sbo sbp sbs scb scc sci sco scp scs sib sic sii sio sip sis sob soc soi soo sop sos spb spc spi spo spp sps ss- ssb ssc ssi sso ssp sss