
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
In a certain school's student union, there are 4 students from the first year, 5 students from the second year, and 4 students from the third year. If 2 students are to be selected to participate in an event, how many different methods are there to select these 2 students such that they are not from the same grade?

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