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
from sys import stdin, exit
year = int(stdin.readline().rstrip())
year += 1
digits = [0] * 10

while True:
    t = year
    while t > 0:
        digits[t % 10] += 1
        t //= 10
    answer = True
    for i in range(10):
        if digits[i] > 1:
            answer = False
        digits[i] = 0
    if answer:
        print(year)
        exit()
    year += 1