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
# Beautiful Year

year = int(raw_input())

t = True
yearn = year
while (t):
    t = False
    yearn += 1
    digits = {}
    yearn = str(yearn)
    for char in yearn:
        if char in digits:
            digits[char] += 1
        else:
            digits[char] = 1
    for item in digits:
        if digits[item] >= 2:
            t = True
    yearn = int(yearn)

print yearn
