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
b=int(input())
b=b+1
a=str(b)
for i in range(9000):
    l=list(a)
    if l[1]!=l[2] and l[1]!=l[2] and l[1]!=l[3] and l[1]!=l[0] and l[2]!=l[3] and l[2]!=l[0] and l[3]!=l[0]:
        c=''.join(l)
        break
    else:
        e=int(a)
        b=e+1
        a=str(b)
print(c)