-ic b-u bbb bbc bbi bbo bbs bbu bbx bcb bcc bci bco bcs bcu bcx bi- bib bic bii bio bis biu bix bob boc boi boo bos bou box bsb bsc bsi bso bss bsu bsx bub buc bui buo bus buu bux bxb bxi bxo bxx c-- cbb cbc cbi cbo cbs cbu cbx ccb ccc cci cco ccs ccu ccx ci- cib cic cii cio cis ciu cix co- cob coc coi coo cos cou cox csb csc csi cso css csu csx cub cuc cui cuo cus cuu cxc cxi cxo cxs cxx ibb ibc ibi ibo ibs ibu ibx icb icc ici ico ics icu iib iic iii iio iis iiu iix io- iob ioc ioi ioo ios iou is- isb isc isi iso iss isu iu- iub iuc iui ius ixc ixi o-i ob- obb obc obi obo obs obu obx oc- ocb occ oci oco ocs ocu ocx oib oic oii oio ois oiu oo- oob ooc ooi ooo oos oox os- osb osc osi oso oss osu osx ou- ouc oui ouo ous ox- oxb oxc oxi oxo oxx sbb sbc sbi sbo sbs sbu sbx scb scc sci sco scs scu scx sib sic sii sio sis siu six sob soc soi soo sos sou sox ss- ssb ssc ssi sso sss ssu ssx sub suc sui suo sus suu sux sxc sxi sxs sxu ubb ubc ubi ubo ubs ubu ubx ucb ucc uci uco ucs ucu uib uic uii uio uis uiu uob uoc uoo uos uox usb usc usi uso uss usu usx uuc uus uuu uxb uxc uxo uxu xbc xbx xcb xci xcx xic xii xio xis xiu xix xoc xoi xoo xos xox xsb xsc xsi xss xui xus xxi xxo xxx