Some of the symbols are intended to link to aspects of what happens. Things and events available to everyone. The word 'public' is used to refer generally to these things and events, meaning 'available to everyone'. Words like 'toothache', 'feeling', 'sensation', 'conscious', and 'mental state', refer to them. The word 'private' and 'inner' are used to refer generally to them, meaning 'available only to me'.
People use 'toothache' to refer to an event in the region labelled 'private'.
They say that different people may have different private sensations of toothache associated with the same public events of chipped teeth. The same chip may hurt one person more than another. The 'public region' is the region of things and events which many people experience. This analysis is intended purely as a redescription of what is said, and believed, everyday. Non-everyday arguments concerning the adequacy both of these everyday concepts, and belief in what they refer to, are presently irrelevant.