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
number =int(input())

while True:
    number += 1
    a = str(number)[0]
    b = str(number)[1]
    c = str(number)[2]
    d = str(number)[3]
    if a!=b and b!=c and c!=d and b!=d and a!=d and a!=c:
        print(str(a)+str(b)+str(c)+str(d))
        break