sob soc soe soi sol soo sor sos sou sox sr- sra srb src sre sri srl sro srr srs srx ss- ssa ssb ssc sse ssi ssl sso ssr sss ssu ssx sua sub suc sue sui sul suo sur sus suu sux sxc sxi sxl sxs sxu ua- uaa uab uac uae uai ual uao uar uas uau uba ubb ubc ube ubi ubl ubo ubr ubs ubu ubx uca ucb ucc uce uci ucl uco ucr ucs ucu uea ueb uec uee uei uel uer ues uia uib uic uie uii uil uio uir uis uiu ula ulb ulc ule uli ull ulo ulr uls ulu uoa uob uoc uoe uol uoo uor uos uox ur- ura urb urc ure uri url uro urr urs uru urx usa usb usc use usi usl uso usr uss usu usx uua uuc uue uur uus uuu uxb uxc uxo uxr uxu xaa xac xal xar xas xau xbc xbe xbl xbr xbx xcb xci xcl xcr xcx xee xel xer xes xeu xex xia xic xie xii xio xis xiu xix xla xlb xli xlr xls xoa xoc xoi xoo xor xos xox xrc xrx xsa xsb xsc xsi xsl xss xue xui xul xus xxi xxl xxo xxx