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 Thu Jun 25 22:14:59 2020

@author: pc612
"""

n = input()
flag = False

while flag==False:
    if int(n)!=10000:
        n=int(n)+1
    l = [term for term in str(n)]
    f = len(set(l))
    if f == 4:
        flag = True

print(n)