
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
David recently bought a large supply of letter tiles.  One day he arrives back to his dorm to find that some of the tiles have been arranged to read  $\textsc{Central Michigan University}$ .  What is the smallest number of tiles David must remove and/or replace so that he can rearrange them to read  $\textsc{Carnegie Mellon University}$ ?

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