
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
How many four-digit whole numbers exist where the leftmost digit is even, the second digit is odd, the third digit can be any digit other than those used in the first two digits, and the fourth digit is the sum of the first and second digits modulo 10?
A) 160
B) 250
C) 320
D) 390
E) 480

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