
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
Lenny the Lion and Gerry the Giraffe are climbing a flight of stairs. Lenny leaps three steps at a time, and Gerry leaps by four steps per leap (or fewer, if needed to reach the top). It is noted that Gerry takes 24 fewer leaps than Lenny to climb the entire staircase. Determine the sum of the digits of the total number of stair-steps that could possibly make up this staircase.
**A)** 17
**B)** 18
**C)** 19
**D)** 20
**E)** 21

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