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 Oct  8 13:03:35 2020

@author: jion
"""

y = int(input())
for z in range(1000,10000):
    n = 0
    for i in range(1,len(str(z))):
       if sorted(list(str(z)))[i] == sorted(list(str(z)))[i-1]:
           n += 1
    if z > y and n == 0:
        print(z)
        break