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
i = int(input())
i = i + 1
while i < 9999:
    k = i // 1000
    b = (i - (k*1000)) // 100
    l = ((i - (k*1000)) - (b*100)) // 10
    m = ((i - (k*1000)) - (b*100)) - (l*10)
    if (k == b) or (k == l) or (k == m) or (b == l) or (b == m) or (l == m):
        i = i + 1
    else:
        break
print(i)