bbb bbo bbs bbt bjj bjs bjt bob boj boo bos bot bsb bsj bso bss bst btb bto bts btt jbj jbo jbs jbt jjb jjj jjs job joj joo jos jot jsb jsj jso jss jst jtb jts jtt ob- obb obj obo obs obt ojb ojo ojs oo- oob ooo oos oot os- osb osj oso oss ost ot- otb oto ots ott sbb sbj sbo sbs sbt sjb sjj sjs sjt sob soj soo sos sot ss- ssb ssj sso sss sst stb stj sto sts stt tbb tbj tbo tbs tbt tjo tjs to- tob toj too tos tot tsb tsj tso tss tst ttb tto tts ttt