
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
The digits from 1 to 9 are each written on nine separate pieces of paper and placed in a hat. Jack randomly selects one piece of paper and then returns it to the hat. Jill then randomly selects one piece of paper. Calculate the most likely units digit of the sum of the numbers selected by Jack and Jill.

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