
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
A certain city is constructing Metro Line $2$. One project was originally planned to be completed independently by Team A in $20$ days. After Team A worked for $4$ days, in order to speed up the progress, Team B was brought in to work together with Team A. As a result, the task was completed $10$ days earlier than the original plan. Find: the time needed for Team B to complete this project independently.

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