Question: Example # 1 Enter input: spring _ 2 4 invalid Example # 2 Enter input: 8 little pigs! valid Example # 3 Enter input: Computer

Example #1
Enter input: spring_24
invalid
Example #2
Enter input: 8 little pigs!
valid
Example #3
Enter input: Computer science?
invalid
Example #4
Enter input: the obstacle is the way.
valid

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