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():
    entrega = 0
    es = False
    recibe = int(input())

    i = 0;
    while (not es):

        recibe += 1;
        entrega = recibe;
        es = True;
        entrega = str(entrega)
        for i in range(len(entrega)):

            for j in range(i + 1, len(entrega)):

                if (entrega[i] == entrega[j]):
                    es = False;

    print(entrega)
    return entrega


main()