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 = input()
def isalldiff(num):
    s_num = str(num)
    for i in range(0,len(s_num)):
        for c in range(0,len(s_num)):
            if c != i and s_num[i] == s_num[c]: return False
    return True


while True:
    n += 1
    if isalldiff(n): break



print n