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
def uniqueCharacters(str):
    # If at any time we encounter 2
    # same characters, return false
    for i in range(len(str)):
        for j in range(i + 1, len(str)):
            if (str[i] == str[j]):
                return False;

                # If no duplicate characters
    # encountered, return true
    return True;

n = input()
n = str(int(n) + 1)
while 1:
    if uniqueCharacters(n):
        print(n)
        break
    else:
        n = str(int(n) + 1)