#FIG 3.1
Portrait
Center
Inches
1200 2
6 6225 150 10500 3600
6 8175 150 9525 675
2 2 0 2 -1 7 0 0 -1 0.000 0 0 -1 0 0 5
	 8250 225 9450 225 9450 600 8250 600 8250 225
4 0 -1 0 0 18 18 0.0000 4 270 1035 8325 510 isEmpty\001
-6
6 6750 1575 7425 2100
2 2 0 2 -1 7 0 0 -1 0.000 0 0 -1 0 0 5
	 6825 1650 7350 1650 7350 2025 6825 2025 6825 1650
4 0 -1 0 0 18 18 0.0000 4 195 315 6900 1920 at:\001
-6
6 9150 1575 10500 2400
2 2 0 2 -1 7 0 0 -1 0.000 0 0 -1 0 0 5
	 9225 1650 10425 1650 10425 2325 9225 2325 9225 1650
4 0 -1 0 0 18 18 0.0000 4 210 585 9300 1905 add:\001
4 0 -1 0 0 18 18 0.0000 4 150 1050 9300 2235 remove:\001
-6
6 9150 3000 9975 3600
2 2 0 2 -1 7 0 0 -1 0.000 0 0 -1 0 0 5
	 9225 3075 9900 3075 9900 3525 9225 3525 9225 3075
4 0 -1 0 0 18 18 0.0000 4 210 525 9300 3420 first\001
-6
2 1 0 2 -1 7 0 0 -1 0.000 0 0 -1 0 0 2
	 7725 750 6450 1425
2 1 0 2 -1 7 0 0 -1 0.000 0 0 -1 0 0 2
	 7725 750 8925 1425
2 1 0 2 -1 7 0 0 -1 0.000 0 0 -1 0 0 2
	 6375 1950 6375 3000
2 1 0 2 -1 7 0 0 -1 0.000 0 0 -1 0 0 2
	 8850 1950 6375 3000
2 1 0 2 -1 7 0 0 -1 0.000 0 0 -1 0 0 2
	 8925 1950 8925 3000
4 0 -1 0 0 18 24 0.0000 4 285 270 7575 675 X\001
4 0 -1 0 0 18 24 0.0000 4 285 270 6300 1845 A\001
4 0 -1 0 0 18 24 0.0000 4 285 255 8775 1890 Y\001
4 0 -1 0 0 18 24 0.0000 4 285 270 6225 3360 B\001
4 0 -1 0 0 18 24 0.0000 4 285 270 8775 3345 C\001
-6
6 1275 1050 5550 2700
4 0 -1 0 0 18 18 0.0000 4 270 2085 1275 1275 A={isEmpty, at:}\001
4 0 -1 0 0 18 18 0.0000 4 270 4020 1275 1935 B={isEmpty, at:, add:, remove:}\001
4 0 -1 0 0 18 18 0.0000 4 270 4245 1275 2595 C={isEmpty, add:, remove:, first}\001
-6