Beautiful Year

Time Limit: 1000 ms Memory Limit: 65536 KiB

Problem Description

       It seems like the year of 2013 came only yesterday. Do you know a curious fact? The year of 2013 is the first year after the old 1987 with only distinct digits.
      Given a year number, find the minimum year number which is strictly larger than the given one and has only distinct digits.

Input

 There are multiple test cases.
Each test case contains a single line contains integer y (1000 ≤ y ≤ 9000) — the year number.

Output

For each test case:
Print a single integer — the minimum year number that is strictly larger than y and all it's digits are distinct.
It is guaranteed that the answer exists.

Sample Input

1987
2013

Sample Output

2013
2014

Hint

 

Source

qinchuan