ead in a time such as $3$ pm and print the equivalent military hour $($such as $15).$ Validate the input.

If the input doesn't start with an integer, print: Error: Not an integer.

If the number isn't between $1$ and $12,$ print: Error: The hour must be between $1$ and $12.$

If the suffix isn't $"$am$"$ or $"$pm$",$ print: Error: The suffix must be am or pm$.$