In this task, you are given two natural language statements with similar wording. You must choose the statement that makes less sense based on common sense knowledge. A '
' separates the statements. Use "first" or "second" to indicate which sentence makes less sense.

Input: Consider Input: Only birds can fly
Only humans can fly

Output: second


Input: Consider Input: The two children threw a ball back and forth.
The two children threw a knife back and forth.

Output: second


Input: Consider Input: I ran a marathon.
I ran a train.


Output: second