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
N = int(input())
while True:
    n = list(str(N+1))
    n.sort()
    i = 0
    s = 0
    while i < len(n) - 1:
        if n[i] == n[i + 1]:
            s += 1
        elif n[i] != n[i + 1]:
            s += 0
        i += 1
    if s == 0:
        break
    N += 1
print(N+1)