The following English words have something in common:
we're, dying, nice, slight
Don't give away the common factor, but instead list another word on the list in your answer.
Ah, the second part of your rule in the solution was never taught in my grade school.
That is why, to me, your allowed examples seemed inconsistent. In fact, some studies of the "rule" advocate dropping all such caveats.
link for the history of the "rule" is hererule
Einstein would drink "one" German stine to all this.