1000 1000
OPEN 0 0 10 10
OPEN 10 0 10 10
OPEN 20 0 10 10
OPEN 0 10 10 10
OPEN 10 10 10 10
OPEN 20 10 10 10
OPEN 0 20 10 10
OPEN 10 20 10 10
OPEN 20 20 10 10
CLOSE 19 19
CLOSE 20 20
CLOSE 0 10
