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 Tue Aug 14 09:59:42 2018

@author: Minh Tuấn1
"""

def year(numb): 
    for i in range(int(numb)+1,9100): 
        nub = list(str(i))
        dic = dict.fromkeys(nub,0)
        for item in nub: 
            dic[item]+=1
        lis = []
        for a,b in dic.items(): 
            lis.append(b)
        if len(lis) == 4:
            return ''.join(nub)
a = input()
print(year(a))