
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
Vasya needs to plant 7 trees in a row. Each planted tree can either be a birch or an oak. The planting must satisfy the condition that each tree of one type must be adjacent to a tree of the other type. In how many different ways can Vasya perform the planting? Two ways are considered different if there is a place where trees of different types grow.

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