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=int(input())
true=True
num=0
b=a+1
while true:
    c=[]
    for i in str(b):
        c.append(i)
    ture=True
    nums=[]
    for i in c:
        if i not in nums:
            nums.append(i)
        else:
            ture=False
    if ture:
        true=False
        num=b
    b+=1
print(num)
