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


n = int(input())
def is_wow(n):
    l = []
    f = True
    while n > 0:
        o = n % 10
        if o in l:
            f = False
        l.append(o)
        n = n // 10
    return f
for i in range(n+1,9100):
    if is_wow(i):
        print(i)
        break