
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
In a class, there are 15 boys and 15 girls. On March 8th, some boys called some girls to congratulate them (no boy called the same girl twice). It turned out that the students can be uniquely paired into 15 pairs such that each pair consists of a boy and a girl whom he called. What is the maximum number of calls that could have been made?

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