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
def unique(x):
    y=list(str(x))
    ans = False
    if len(y) == len(list(set(map(str,y)))):
        ans=True
    else:
        ans=False
    return ans
n=int(input())
if n>=8976:
    print(9012)
else:
    for i in range(n+1,8977):
        if unique(i)==True:
            print(i)
            break