thres c -2,0 769
thres c 1,1 769
thres c 5,-1 769
thres c -5,-3 769
thres c -4,-2 769
thres c -1,-3 769
thres u -1:3,-1 512
thres u 0:2,0 512
thres d -3,1 0
thres l -3,1 1
thres i 2,-2 999
des 2,-2 k
thres h 2,-2 1
des -3,1 j
bmap #
cen *
map #
read y
prod *
