b-u bbb bbe bbg bbs bbu be- beb bee beg bes beu bgb bge bgg bgs bgu bsb bse bsg bss bsu bub bue bug bus buu ebb ebe ebg ebs ebu eeb eee eeg ees egb ege egg egs egu es- esb ese esg ess esu eu- eub eue eug eus gbe gbg gbs gbu ge- geb gee geg ges geu ggb ggg ggs ggu gsb gse gsg gss gsu gu- gub gue gug gus guu sbb sbe sbg sbs sbu se- seb see seg ses seu sgb sge sgg sgs sgu ss- ssb sse ssg sss ssu sub sue sug sus suu ubb ube ubg ubs ubu ueb uee ueg ues ugb uge ugg ugs ugu usb use usg uss usu uue uug uus uuu