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A. Beautiful Year

time limit per test

2 secondsmemory limit per test

256 megabytesinput

standard inputoutput

standard outputIt 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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