
Consider the function f shown in the Karnaugh map below. Implement this
function.

      x[1]x[2]x[3]x[4]
      00  01  11  10
  00 | 1 | 0 | 0 | 1 |
  01 | 0 | 0 | 0 | 0 |
  11 | 1 | 1 | 1 | 0 |
  10 | 1 | 1 | 0 | 1 |

module TopModule (
  input [4:1] x,
  output logic f
);

