
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
Along a straight alley, there are 400 streetlights numbered consecutively from 1 to 400 at equal intervals. Alla and Boris start walking towards each other from opposite ends of the alley at the same time, but with different constant speeds. Alla starts at the first streetlight, and Boris starts at the 400th streetlight. When Alla reaches the 55th streetlight, Boris is at the 321st streetlight. At which streetlight will they meet? If the meeting occurs between two streetlights, provide the smaller number of the two in the answer.

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