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.
The single line contains integer *y* (1000 ≤ *y* ≤ 9000) — the year number.
# -*- coding: utf-8 -*-
"""
Created on Wed Sep  6 21:47:46 2023

@author: mac
"""

y = int(input())
while (True):
    y += 1
    if len({l for l in str(y)}) == len(str(y)):
        break
print(y)