b-u bbb bbe bbi bbo bbs bbu be- beb bee bei beo bes beu bi- bib bie bii bio bis biu bob boe boi boo bos bou bsb bse bsi bso bss bsu bub bue bui buo bus buu ebb ebe ebi ebo ebs ebu eeb eee eeo ees eib eie eii eio eis eiu eo- eob eoe eoi eoo eos eou es- esb ese esi eso ess esu eu- eub eue eui eus ibb ibe ibi ibo ibs ibu ie- iee iei ies iib iie iii iio iis iiu io- iob ioe ioi ioo ios iou is- isb ise isi iso iss isu iu- iub iue iui ius o-i ob- obb obe obi obo obs obu oeb oee oei oeo oes oib oie oii oio ois oiu oo- oob ooi ooo oos os- osb ose osi oso oss osu ou- oue oui ouo ous sbb sbe sbi sbo sbs sbu se- seb see sei seo ses seu sib sie sii sio sis siu sob soe soi soo sos sou ss- ssb sse ssi sso sss ssu sub sue sui suo sus suu ubb ube ubi ubo ubs ubu ueb uee uei ues uib uie uii uio uis uiu uob uoe uoo uos usb use usi uso uss usu uue uus uuu