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 Oct 18 12:57:21 2020

@author: 赵泽华
"""

y=int(input())
y+=1
year=str(y)

for i in range(8001):
    if year[0]!=year[1] and year[0]!=year[2] and year[0]!=year[3] and year[1]!=year[2] and year[1]!=year[3] and year[2]!=year[3]:
        print(y)
        break
    else:
        y+=1
        year=str(y)