
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
Anna has 4 red pens and 4 blue pens. She places them in a line on her desk randomly and then randomly picks 4 of them to lend to her friend. What is the probability that the leftmost pen is blue and not picked, and the rightmost pen is red and picked?

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