
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
An integer is defined as calm if it either consists of a single digit or all its digits, when read from left to right, form a strictly increasing or strictly decreasing sequence. The sequence is formed using only digits from 0 to 7. Determine how many calm integers exist.
(Note: Zero by itself is also calm as it's a single-digit number.)
A) 385  
B) 387  
C) 389  
D) 391  
E) 395

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