
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 family arrived at a bridge at night. The father can cross it in 1 minute, the mother in 2 minutes, the son in 5 minutes, and the grandmother in 10 minutes. They have one flashlight. The bridge can hold only two people at a time. How can they cross the bridge in 17 minutes? (When two people walk on the bridge, they go at the pace of the slower person. No one can walk on the bridge without the flashlight, and the flashlight cannot be shined from afar or thrown across the river.)

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