K-map to circuit (wrap-around groups)

Implement the function f described by the Karnaugh map below. The four inputs arrive as a vector x[4:1]; columns give x[1] and x[2], rows give x[3] and x[4]. There are no don't-cares — your circuit must match every cell exactly.

	x1'x2'	x1'x2	x1x2	x1x2'
x3'x4'	1	0	0	1
x3'x4	0	0	0	0
x3x4	1	1	1	0
x3x4'	1	1	0	1

Remember that the map wraps: the four corner cells are mutually adjacent, and so are cells on opposite edges of the same row or column.