
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 approached a bridge at night. The father can cross it in 1 minute, the mother in 2 minutes, the child 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? (If two people cross together, they move at the slower person's speed. Crossing the bridge without a flashlight is not allowed. Shining the flashlight from afar is not allowed. Carrying each other is not allowed.)

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