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
jahr = input()

k = 0
while k != 1:
    jahr = int(jahr)+1
    jahr = str(jahr)
    jahrlist1 = list(jahr)
    jahrlist2 = list(jahr)
    i = 0
    count = 0
    while i < len(jahr):
        jahrlist2[i] = "X"
        if jahrlist1[i] in jahrlist2:
            i = len(jahr)
        else:
            count += 1
        i += 1
    if count > len(jahr)-1:
        k = 1
    else:
        k = 0
print(jahr)
