HINTS

2.1

Use what you know about the names of the machines and the colours of the wires to help assign letters to the symbols you see in figs. i-iv before tackling fig. v.

2.2

Pay close attention to the conditions of the grid in fig. viii…

2.3

Knowing where to start on the upper keyboard also lets you know where to go next. Knowing what the symbols mean on the lower keyboard allows you to make sense of these movements.