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 = int(input())

y = year+1
count = dict()
yr = y

while yr>year:
    #print("year:",yr,"y:",y)
    while y > 0:
        r = y%10
        y //= 10
        if r not in count.keys():
            count[r] = 1
        else:
            count[r] += 1
    y = yr+1
    if len(count.keys()) == 4:
        break;
    yr += 1
    count.clear()
print(yr)
