
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
A father decided to give his son Mojmir an allowance once a month. Mojmir received his first allowance in January. Each month, the father increased the allowance by 4 CZK. If Mojmir did not spend any money, he would have 900 CZK by the twelfth allowance before Christmas. How many CZK did Mojmir receive for his first allowance in January?

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