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
# http://codeforces.com/problemset/problem/271/A you start this should be like a 2-liner with python?

#sry i see it now


def check(x): # let's practice writing functions though and yeah i think list == array so not list prolly
# http://anh.cs.luc.edu/python/hands-on/3.1/handsonHtml/functions.html
    return len(set(str(x)))==len(str(x)) # should work??
y = int(input()) + 1 #scott wait you don't even right? you can do like list(str(y)) or something

while not check(y): y+=1 #scott

print(y) #steven remember ++ doesn't exist
