Description: A truncatable prime is a prime number which contains no zeros in decimal notation and all its suffixes are primes. 1 is considered to be not a prime. You are given a positive integer n. Figure out whether it is a truncatable prime. Input Format: The only line of input contains an integer n (2 ≤ n ≤ 107). Output Format: Output "YES" if n is a truncatable prime. Output "NO" otherwise. Quotes for clarity only. Note: In the first sample 19 is a prime but its suffix 9 is not. In the second sample 9137, 137, 37 and 7 are all primes, so 9137 is a truncatable prime.