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
## a year with distinct digits
n = int(input())
for i in range((n+1),9013):
    c=[];
    f=0;
    tp = str(i)
    c.append(tp[0])
    for j in range(1,4):
        for k in c:
            if tp[j]==k:
                f=-1;
                break;
        if f==-1:
            break;
        else:
            c.append(tp[j]);
            f=0;
            continue;
    if f==-1:
        continue
    else:
        print(i);
        break;
