Using a combination of black square tiles and oblong tiles chosen from: red tiles measuring two units, green tiles measuring three units, and blue tiles measuring four units, it is possible to tile a row measuring five units in length in exactly fifteen different ways.
<imgclass="img-responsive center-block"alt="Possible ways of placing red, green and blue oblongs on a row with length of five units"src="https://cdn.freecodecamp.org/curriculum/project-euler/red-green-and-blue-tiles.png"style="background-color: white; padding: 10px;">
How many ways can a row measuring fifty units in length be tiled?