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
L = input()
s = int(L)
while True:
    s += 1
    l = str(s)
    flag = False
    k = 0
    for i in range(4):
        if flag == True:
            break
        for j in range(i+1,4):
            if l[i] == l[j]:
                flag = True
                break
            else:
                k += 1
    if k == 6:
        print(s)
        break