Prime palindromes#8289
Count the number of prime palindromes in the interval from to (inclusive).
A palindrome is a number that reads the same forwards and backwards, for example, , , .
A prime number is a number that has exactly divisors.
The input contains two integers and (0 \le a, b \le 10^7) given on a single line, separated by a space.
Print the number of prime palindromes in the interval from to (inclusive).
Example 1