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
inyear = int(input())
n = []
for t in range(1,10):
    for h in range(10):
        for d in range(10):
            for u in range(10):
                if t != h and t != d and t != u:
                    if h != d and h != u:
                        if d != u:
                            n.append(int(str(t)+str(h)+str(d)+str(u)))
for year in n:
    if year > inyear:
        print(year)
        break
