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
year = int(input())
MAX = 9000
MIX = 1000
def is_year_distinct(year: int) -> bool:
    x = set()
    for c in str(year):
        if c in x:
            return False
        x.add(c)
    
    return True


def solution(year: int) -> int:
    for y in range(year+1, MAX+MIX):
        if is_year_distinct(y):
            return y

    return False

print(solution(year))
