'P$Q' means 'P is to the north of Q'.

'P&Q' means 'P is to the east of Q'.

'P*Q' means 'P is to the South of Q'.

'P%Q' means 'P is to the West of Q'.

'P@QR' means 'P stands exactly in the middle of horizontal line QR'.

'P!QR' means 'P stands exactly in the middle of vertical line QR'.

Note: 'P6m$Q' means 'P is 6 m to the north of Q' and so on.

Find the shortest distance between T and D in the following expression. 

H6m*G10m%D13m$K7m&R@KT