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
test = int(input())
res = 0
for y in range(test+1, 10000):
    year = str(y)
    n = len(year)
    for i in range(n-1):
        sum = 0
        for j in range(i+1, n):
            if year[i] == year[j]:
                sum+=1
        if sum > 0:
            break
    if sum == 0:
        res = year
        break

print(res)
