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 main():
    y = int(input())
    n = y+1
    l = list(str(n))
    dd = False
    while dd == False:
        if l[0] != l[1] and l[0] != l[2] and l[0] != l[3] and l[1] !=l[2] and l[1] != l[3] and l[2] != l[3]:
            print(str(l[0] + l[1] + l[2] + l[3]))
            dd = True
        else:
            n += 1
            l = list(str(n))
main()