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
s = int(input())

t = s + 1
ans = 0
while ans == 0 :
    d = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
    tt = t
    while tt > 0 :
        d[tt % 10] += 1
        tt //= 10
    cnt = 0
    for i in range (0, 10) :
        if d[i] != 0 :
            cnt += 1
    if cnt == 4 :
        ans = 1
    t += 1
print(t - 1)