
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
Tom has a red marble, a green marble, a blue marble, an orange marble, and four identical yellow marbles. How many different groups of three marbles can Tom choose, where at least one marble must be yellow?

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