
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 that there are two chemical raw materials that cannot be used at the same time, and one of them must be added first when used, determine the total number of different possible addition sequences for five available raw materials.

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