ostom[7], stoom[7], wotom[7], owsom[6], sowom[6], towos[6],
most[6], osom[5], somo[5], stoo[5], mowo[5], sowo[4],
tom[5], omo[4], osm[4], som[4], oto[4], sto[4], oso[3], owo[3],
om[3], ot[3], to[3], ts[3], os[2],
