bbb bbi bbn bbo bbs bi- bib bii bin bio bis biv bnb bni bnn bno bns bnv bob boi bon boo bos bov bsb bsi bsn bso bss bsv bvb bvi bvn bvo bvs bvv i-v ibb ibi ibn ibo ibs ibv iib iii iin iio iis in- inb ini inn ino ins inv io- iob ioi ion ioo ios iov is- isb isi isn iso iss isv ivb ivi ivo ivs ivv n-i nbb nbi nbn nbo nbs nbv nib nii nin nio nis niv nnb nni nnn nno nns nnv no- nob noi non noo nos nov nsb nsi nsn nso nss nsv nvb nvi nvn nvv o-i ob- obb obi obn obo obs obv oib oii oin oio ois oiv on- onb oni onn ono ons oo- oob ooi oon ooo oos oov os- osb osi osn oso oss osv ov- ovb ovi ovo ovs ovv sbb sbi sbn sbo sbs sbv sib sii sin sio sis siv snb sni snn sno sns snv sob soi son soo sos sov ss- ssb ssi ssn sso sss ssv svb svi svn svo svs svv vbi vbo vbs vbv vi- vib vii vin vio vis viv vn- vni vno vns vnv vob voi von voo vos vov vsb vsi vsn vso vss vsv vvb vvi vvo vvs vvv