Experiments with interpretation of the labels. The label otol.

[Searcher]

There are (ref. VQP) 8558 vords starting with "o", i.e. "o*" wildcard (neglecting standalone "o")
Of those:
2417 are ot*
2474 are ok*
360 are op*
240 are od*
89 are of*
(these are pre-gallows and pre-d), the subtotal is 5580 or 65%. I'd say these are all operators.

Next, there are:
1069 ol*
244 or*
538 ol (just two-character vord)
366 or (just two-character vord)
the subtotal is 2217, or 26%

I guess that ol* and or* are composites here, - in other words, "o" is not an operator here.

What remains are 661 occurrences, such as 173 oc*, 132 oe* etc.

So my first guess would be that every vord-starting o beyond that in basic bigrams ol and or is a relational operator.

Ok. I understand your division.
Let's take the starting "o" for the conjunction "with" (as you suggested) before the following f, k, t, p, d. Thus, we get the conjunction that appears before the words that begin only with the same five letters. Why?