
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
Find the number of nondegenerate triangles whose vertices lie in the set of points  $(s,t)$  in the plane such that  $0 \leq s \leq 4$ ,  $0 \leq t \leq 4$ ,  $s$  and  $t$  are integers.

Present the answer in LaTex format: \boxed{Your answer}
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