I have four variable and four equation how to solve it?

Solve[{w == x + e - Sqrt[(a/m)*(x - y - e)],y == z + f - Sqrt[(z + f)*(x - w + e)], x == w - e + Sqrt[(a/(m - h))*(z - w - e)],z == y - f + Sqrt[(a/s)*(y - f)]} {w, x, y, z}] .  

Here w, x, y and z are variables while others like a, m, e and f are constants.