
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
Given 4 people of different heights, arranged in 2 rows and 2 columns, where each person in the first row is shorter than the person directly behind them in the same column, calculate the total number of possible arrangements.

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