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
year = int(input(''))
count = 0

def isUniqueChars(st):
    char_set = [False] * 128
    for i in range(0, len(st)):
        val = ord(st[i])
        if char_set[val]:
            return False
        char_set[val] = True
    return True

x = True
year += 1
while x == True:
    word = str(year)
    if isUniqueChars(word) == True:
        x = False
    else:
        year = int(word)
        year += 1
        continue
print(word)