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 Nov 25 14:16:28 2018

@author: Bipin B
"""

#http://codeforces.com/problemset/problem/271/A
def checkifUnique(year):
    temp=str(year)
    for i in temp:
        if temp.count(i) != 1:
            return 0
    return 1

year=int(input())
year=year+1
while year<=10000:
    if checkifUnique(year):
        print(year)
        break;
    year=year+1