Kinkonkan

Kinkonkan is a Japanese logic puzzle. Place mirrors in the correct position so that light rays arrive at the right place after a given number of reflections.

Rules: Place one mirror in each region of the grid as a diagonal line inside the cell.
The letters outside the grid indicate the locations where the laser beams enter the grid. The number next to the letter indicates the number of times the beam is reflected in the mirror.
The beam leaves the grid at the location indicated by the same letter as where the beam entered the grid. Each mirror must reflect at least one laser beam.