
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
Weis needs to take care of three children named A, B, and C. Since Weis knows the children like big numbers, he designed a counting game for them: first, A says 1, then B must say the next two numbers, 2 and 3, then C must say the next three numbers, 4, 5, and 6. After that, A must say the next four numbers, 7, 8, 9, 10, and so on. This process continues in a cycle, with each child saying one more number than the previous child, up to 10000. Find the 2019th number A says.

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