We know that prime numbers whose reversal is a different prime number are called emirps.

For example, 149 is an emirp, since each of 149 and 941 is a prime number.

Accordingly, 1:49 is a emirp time because 149 is an emirp.

1. Determine the total number of emirp times in 12 hours.
2. Determine the total number of emirp times in 24 hours.