
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
Our school's basketball team has 16 players, including a set of twins: Betty and Bobbi. In how many ways can we choose a lineup of 7 players if exactly one of the twins is in the lineup and at least two seniors must also be selected, given there are 5 seniors on the team?

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