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
import itertools

def beauty(year):
    combi = itertools.combinations(year, 2)
    for i in combi:
        if i[0] == i[1]:
            return False
    return True

year = input()
nexty = int(year) + 1

while beauty(str(nexty)) != True:
    nexty += 1

print(nexty)