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
y=int(input())
ans=0
def distinct(n):
    n=str(n)

    l=[]
    for i in n:
        l.append(int(i))


    unique=[]
    for i in l:
        if i not in unique:
            unique.append(i)
    if len(unique)==4:
        return True
    else:
        return False



while ans==0:
    y=y+1
    if distinct(y):
        ans=y
        print(ans)
    else:
        ans=0