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 port(n):
    c=n
    bt=0
    for i in range(10):
        t=0
        a=n
        while a!=0:
            y=a%10
            a=a//10
            if i==y:
                t=t+1
            if t>bt:
                bt=t
    if bt==1:
        return c
    else:
        return -1
n=int(input())
a=n+1
while port(a)==-1:
    a=a+1
print(a)

