Study the following information carefully and answer the given questions:
A person starts walking from point D to the east direction and walks 48 m to reach at point E. From point E he takes two consecutive left turns and walks 18 m and 24 m respectively and reach at point F. From point F he walks in south direction and walks 25 m to reach at point G, then finally turn his left and walks 24 m to reach final point H.
If point J is the midpoint of point D and E, then what is the shortest distance between point J to his final position?