
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
In a collection of 10 different colored marbles, Johnny must first choose any four marbles, and then he must select two marbles from these four. How many different ways can Johnny complete this selection process?

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