Eight persons A, B, C, D, P, Q, R, and S are seated around two inscribed square tables such that four persons occupy the corners of the inner square a...

Eight persons A, B, C, D, P, Q, R, and S are seated around two inscribed square tables such that four persons occupy the corners of the inner square and four occupy the corners of the outer square. Each person sitting on the inner square faces a person sitting on the outer square. Given the following conditions:

• C faces the person who is 2nd to the right of S.
• Q is neither an immediate neighbor of S nor C.
• D faces R and is an immediate neighbor of Q.
• A sits immediately to the left of R.
• B faces P.
• Neither P nor A face outside.

Question: How many persons sit between S and D when counted to the right of S?

(Count only the persons sitting on the same square as S when moving to the right.)