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
a = int(input())
check = False
found = False
for i in range(1000):
    if found:
        break
    a += 1 
    s = str(a)
    for x in range(len(s)):
        for z in range(x + 1, len(s)):
            if s[x] == s[z]:
                check = True
                break
            elif z == len(s) - 1 and x == len(s) - 2:
                print(a)
                found = True
        if check:
            check = False
            break