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 isDistinct(year) : 

    for i in range(0, 4) : 
        for j in range(0, 4) : 
            if i != j : 
                if year[i] == year[j] :
                    return False
    return True

year = int(input())

for i in range(year + 1,100000)  :
    if isDistinct(str(i)):
        print(i)
        break

