The forest is described as follows:
S: the start of the forest
T: the destination of the forest
#: the passway in the forest
*: the trees in the forest
Now please figure out that is it possible to pass through the forest.
The first line of the input give two integer M N, representing the height and the width of the forest.
Then the following M*N arrays gives the description of the forest.
Note. 3<=M, N<=100
Give the answer(yes/no) that can we pass through the forest.
Remember to print a '\n' at the end of the output.