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 disDig (n):
    a = []

    while (n!=0):
        a.append(n%10)
        n /= 10

    a.sort()

    l = len(a)

    for i in range (1,l):
        if (a[i] == a[i-1]):
            return False

    return True

while (True):
    try:
        n = input()

        flag = False

        while (flag == False):
            n += 1
            
            flag = disDig(n)

        print n

    except EOFError:
        break
