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 isBeautiful(num):
    temp = []
    # print(num)
    while num >= 1:
        temp.append(num%10)
        # print(num, temp)
        num = num // 10

    if len(temp) == len(set(temp)):
        return True

    return False

year = int(input())
year +=1
while isBeautiful(year) == False:
    year += 1


print(year)