3D spiral traversal

Team is aiming to traverse a 3-dimensional matrix in spiral order. Being a 3-dimensional matrix one can start from any element lying in one of the four outermost planes as shown in Fig. 1. The indices, i.e. the first index, the second index, and the third index, of starting point for traversal are given as an input. The starting point should belong only to one of the four outermost planes, i.e. an