WHITE: K-e1; R-a1; R-h1; Pawns: a2, b2, c2, d2, f2, g2, h2; Q-c4; BLACK: K-e8; R-a8; R-h8; Pawns: a7, b7, d7, e7, g7, h7; B-a6; N-c3; What are the black king's castling options?