HZNUOJ

Beautiful Year

Tags:
Time Limit:  2 s      Memory Limit:   32 MB
Submission:126     AC:57     Score:97.26

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.

Now you are suggested to solve the following problem: 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 cases, each case contains a integer y (1000 ≤ y ≤ 9000) — the year number.

Output

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.

Samples

input
1987 2013
output
2013 2014