Problems
Prime Substring
Prime Substring
Given a string of digits, your task is to find the largest prime number which presents in that string. Our prime numbers are values between 2 to 100000 only.
Input data
Each line contains a string of digits (255 digits at most). The line contains only 0 indicates the end which will not be processed. The input does not exceed 1000 lines.
Output data
Print out in each line the largest prime number found in each input string.
Examples
Input example #1
11245 91321150448 1226406 0
Output example #1
11 1321 2