What are Pali terms (and sutta references) for the 3 opposites, 3 doors, and 3 gifts, which are associated with the 3 characteristics of existence?

|perceptions| opposites | doors | gifts| |-----------|-----------|--------|------| |aniccā (impermanence)|___ (stability)|___ (signless)|___ (beginner's mind)| |dukkhā (unsatisfactoriness)|sukha (reliability)|___ (wishless)|___ (aspiration)| |anattā (not self)|___ (self confidence)|suññatā (emptiness)|karuṇā (compassion)| I find this series of dharma talks by Gil Fronsdal on the 3 perceptions/characteristics/marks to be very interesting 1. 2015-06-07: annica 2. 2015-06-14: dukkha 3. 2015-07-05: anatta and would like more information on the 1. 3 opposites to be cultivated 2. 3 doors to liberation 3. 3 gifts Specifically, I would like to know 1. What pali terms are used to represent these concepts? (see blank spaces in the table above) 2. What suttas are these discussed in?