[see also: three
The player has to decide which of the two strategies is better for him and act accordingly. [Not: “the 2 strategies''; the numbers 1 to 12, when used for counting objects (without units of measurement), should be written in words.]
The first two are simpler than the third. [Or: the third one; not: “The first two ones”]
One of these lies in the union of the other two.
the last two rows
the following two maps
a two-variable characterization