
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 sample of 20 smartphones is selected from 160 smartphones using systematic sampling (with equal interval rule). These 160 smartphones are randomly numbered from 001 to 160 and then divided into 20 groups in order: 001-008, 009-016, 017-024, ..., 153-160. If the sum of the numbers drawn from the 9th and 10th groups is 140, what is the number determined by drawing lots in the 1st group?

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