Seven boxes F, H, T, O, P, S, L are placed one above another but not necessarily in the same order. Only 3 boxes are placed between T and P, and neither is placed at the top or bottom. S is placed in the middle of the boxes. Two boxes are kept between S and L, which is immediately below T. F is kept above L and below P, but not immediately below. Two boxes are kept between S and H. Which box is placed third below O?