
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 school has hired 6 new teachers, named A, B, and so on, and they need to be assigned to 4 different grades. Each grade must have at least 1 teacher, and teachers A and B must be assigned to the same grade. The number of different ways to assign the teachers is $\boxed{\text{answer}}$.

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