private Guid GetSlotType(string form)
{
var slotType = MoMorphTypeTags.kguidMorphStem;
if (form.StartsWith("-"))
slotType = MoMorphTypeTags.kguidMorphSuffix;
else if (form.EndsWith("-"))
slotType = MoMorphTypeTags.kguidMorphPrefix;
return slotType;
}