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
# -*- coding: utf-8 -*-
"""
Created on Sun Feb 21 15:10:17 2016

@author: mehdishakiba
"""

a = int(raw_input())

while True:
    a += 1
    b = str(a)
    if b[0] not in b[1:]:
        if b[1] not in b[2:]:
            if b[2] not in b[3:]:
                break

print a