
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
Consider a structured pyramid made of stacked blocks. The bottom layer consists of four blocks arranged in a square. Above this, there are three blocks placed such that each rests on two blocks from the layer below. The next layer has two blocks, each supported by two blocks beneath them. Lastly, one block sits on top which rests on the two blocks below. Each block in the bottom layer is randomly assigned a number between 1 and 4. Each upper block gets the sum of the numbers of the blocks directly underneath it. Find the minimum possible number for the top block.
A) 16
B) 18
C) 20
D) 22
E) 24

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