
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
Gabriel Giraffe has many 0's, 1's, 2's, 3's, 4's, 5's, 6's, 8's, and 9's, but he has only nineteen 7's. How far can he number the pages of his storybook from 101 onwards using these digits?
- **A**. 170
- **B**. 179
- **C**. 189
- **D**. 197
- **E**. 199

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