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
y = int(input())
a = 0
b = 0
c = 0
d = 0
i = y
answer = 0
while i >= y:
    i += 1
    a = i // 1000
    b = i // 100 % 10
    c = i // 10 % 10
    d = i % 10
    if a != b and a != c and a != d and b != c and b != d and c != d:
        answer = i
        break
print(answer)
