Given triangle MNL.Line XY is ll to base NL.The line XY intersects the triangle at points X and Y.X lies on MN and Y on ML.The circle passes through X and is tangent to ML at Y,it is intersects triangle at point S(that point lies between X and N).How to prove that the points S,Y,L,N lie on the circle.

I know that we need to prove that quad SYLN is cyclic,but how??