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
x = int(input())
y = list(str(x))
result = 0
for i in range(x+1,9013):
    count = 0
    lst = list(str(i))

    for j in range(4):
        for k in range(j+1,4) :
            if lst[j] == lst[k]:
                count = 1
    if count == 0:
        result = ''.join(lst)
        break
                
print(result)