
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
Quality inspector Xiao Li tested a batch of telephones and found that among the first 50 units, 49 were of high quality. For every subsequent group of 8 units, 7 were of high quality. If the quality rate of this batch of telephones is not less than 90%, calculate the maximum number of telephones in this batch.

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