Read the following instructions:
A$D means 'A is to the North of D^' A&D means 'A is to the East of D' A^* D means ' D is to the West of A ' A%D means 'D is to the South of A' A@DR means 'A stands exactly in the middle of the horizontal line of DR' A!DR means 'A stands exactly in the middle of the vertical line of DR^'
It should be noted that 'A6m$D' means 'A is 6 meters to the north of D' and so on.
Find the shortest distance between S and T in the following expression :
'B12m$S5m*R3m&J6m%K!JT