The following shows procedures how to utilize it.
First, after making a lattice corresponding to Figure
579 as shown in Figure 580-a, one of the
three-digit numbers is inserted into each frame. In order to convert the
numbers into patterns, the patterns of Figure 580-b
are generated. This step is important. After all the numbers are replaced
by visual symbols which have differences in the areas and shapes, the frame
is removed. This results in the work shown in Figure 580-d.
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