c -----------------------------------------------
c Example input file
c -----------------------------------------------
p 8 15 0 2 0
n 0 s
n 7 t
a 0 1 7 0
a 0 2 7 0
a 1 3 5 0
a 1 4 2 0
a 2 1 3 0
a 2 3 4 0
a 2 6 5 0
a 3 4 2 0
a 3 5 3 0
a 3 6 4 0
a 4 7 10 -1.5
a 5 4 4 0
a 5 7 2 -1
a 6 5 2 0
a 6 7 3 0