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 collections
y=int(input());x=0
while True:
    y=y+1
    s=str(y)
    for j in s:
        count=dict(collections.Counter(s))
        if count[j]==1:
            x=x+1
            if x == 4:
                print(int(s))
                break
        else:
            x=0
            break
    if x==4:
        break