GRID MOVES

You are playing a game in which you are in 2D grid of $N X N$ size. In each cell there is a laddu. Initially you are at $(x,y)$ in 0-indexed format on the plane. Given a sequence of moves, find the number of laddus you have eaten after completing all the moves. You are given a string S that represents the sequence of moves you have to take where S[i] denotes the ith move. The moves string has th