
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
Four friends, Albert, Bob, Carla, and Dean, are playing a number game in a park. Here's how the game works: Albert starts by saying "1", then Bob says the next two numbers ("2" and "3"), Carla says the next three numbers ("4", "5", "6"), and Dean says the next four numbers ("7", "8", "9", "10"). They continue in this order, each saying one number more than the previous person did, until they reach or exceed the number 50,000. What is the 5000th number cited by Dean?
A) 4949
B) 4950
C) 5000
D) 5050

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