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
year = input()
def function(check):
    flag = 0
    for x in range(4):
        for y in range((x+1),4):
            if check[x] == check[y]:
                flag = 1
    if flag == 0:
        return check
    else:
        return function(str(int(check)+1))                
print(function(str(int(year)+1)))    
