#FIG 2.1
80 2
2 1 0 1 -1 0 0 0 0.000 -1 0 0
	 79 39 9999 9999
2 1 0 1 -1 0 0 0 0.000 -1 0 0
	 399 529 9999 9999
4 0 18 12 0 -1 0 0.00000 4 15 30 94 104 $tree

4 0 18 12 0 -1 0 0.00000 4 15 39 94 489 $ptype

4 0 18 12 0 -1 0 0.00000 4 15 38 89 69 $close

4 0 18 12 0 -1 0 0.00000 4 15 43 319 69 $X:help

4 2 18 12 0 -1 0 0.00000 4 15 58 384 69 $to:X:help

4 0 18 12 0 -1 0 0.00000 4 15 75 94 334 $Y:alignment

4 2 18 12 0 -1 0 0.00000 4 15 98 389 399 $to:XY:alignment

4 2 18 12 0 -1 0 0.00000 4 15 68 389 429 $to:XY:filter

4 2 18 12 0 -1 0 0.00000 4 15 86 389 454 $to:XY:weights

4 0 18 12 0 -1 0 0.00000 4 15 33 94 509 $Y:go

4 2 18 12 0 -1 0 0.00000 4 15 48 169 509 $to:Y:go

4 0 18 12 0 -1 0 0.00000 4 15 45 199 424 $Y:filter

4 0 18 12 0 -1 0 0.00000 4 15 63 199 454 $Y:weights

4 0 18 12 0 -1 0 0.00000 4 15 29 99 419 Filter

4 0 18 12 0 -1 0 0.00000 4 15 46 99 449 Weights

4 2 18 12 0 -1 0 0.00000 4 15 65 389 304 $to:XY:tree