
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
Set C has 25 elements, and set D has 20 elements, in which 5 elements of set D are not in set C. Calculate the smallest possible number of elements in C ∪ D.

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