Problem3340--Beautiful Year

3340: Beautiful Year

Time Limit: 2 Sec  Memory Limit: 256 MB
Submit: 0  Solved: 0
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Description

time limit per test
2 seconds
memory limit per test
256 megabytes
input
standard input
output
standard output

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

The single line contains 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.

Examples
Input
1987
Output
2013
Input
2013
Output
2014

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