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 new(a):
    for _ in range(1000,9001):
        a=int(a)+1
        
        b=list(str(a).strip())
        
        if (b[0]!=b[1] and b[0]!=b[2] and b[0]!=b[3] and b[1]!=b[2] and b[1]!=b[3] and b[2]!=b[3]):
            return(a)

a=str(input())
print(new(a))