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
# Tasks
# - Create a script to `WORDLIST` problem using the .in and .out files
# - IMPLEMENT ROT13, ROT47, ETC...
# - Implement combinations(arr, r) -> returns all possible combinations or a generator
# --------------------
# 158 B - Taxi
# n = int(input())
# A = list(map(int, input().split()))
# A.sort(reverse=True)
# count = 0
# # write your greedy code here...
# print(count)
# --------------------
n = int(input())
for i in range(n + 1, 9999):
    s = str(i)
    if len(set(s)) == len(s):
        print(i)
        break
