
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
During their family vacation, Laura's parents decide to gift Laura and her three younger siblings new cellphones. They opt for different service providers for each child to accommodate different tastes and needs. With 20 available service providers, how many ways can Laura's parents choose providers for all four children, ensuring no two children receive the same provider?

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