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 Wed Oct 14 14:24:26 2020

@author: 86133
"""

s = []
for i in range(1, 10):
    for j in range(10):
        if j != i:
            for k in range(10):
                if k != i and k != j:
                    for l in range(10):
                        if l != i and l != j and l != k:
                            s += [i*1000 + j*100 + k*10 + l]
n = int(input())
for i in s:
    if i <= n:
        continue
    else:
        print(i)
        break