
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
The distance between points $A$ and $B$ is 40 km. A pedestrian left $A$ at 4:00. When the pedestrian had covered half the distance, a cyclist caught up with him; this cyclist left $A$ at 7:20. One hour after this, the pedestrian met another cyclist who had left $B$ at 8:30. The speeds of the cyclists are identical. Determine the speed of the pedestrian.

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