
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 Al takes one green pill, one pink pill, and one blue pill each day for three weeks, a green pill costs $\$1$ more than a pink pill, while a blue pill costs $\$2$ less than a pink pill, and the total cost of Al's pills for the three weeks is $\$819$, determine the cost of one green pill.

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