The first parameter is a square fleet grid, the second and third parameters are the

row and column indexes of the cell containing the top$-$most$/$left$-$most corner of a

ship, the fourth parameter is a character representing a ship symbol, and the fifth

parameter is the size of a ship. This function returns True if and only if a ship

using the given ship symbol appears with the given size, completely in a row or a

completely in a column at the given starting cell.