
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 recent years, Chinese scientific and technological workers have been practicing the mission of building a "technologically strong country" and continuously achieving world-class scientific and technological achievements. For example, the first deep-sea autonomous remotely operated vehicle "Haidou No. 1" developed by China has a maximum diving depth of 10,907 meters, filling the gap in China's underwater unmanned submersibles for ten thousand meters operations. The independently developed Chinese stratospheric airship "Dabaijing" has set a world record for the highest altitude of atmospheric scientific observation at an altitude of 9,050 meters above sea level. If we denote 9,050 meters above sea level as "$+9050$ meters," then 10,907 meters below sea level can be denoted as ______.

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