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
digits = [0,0,0,0,0,0,0,0,0,0]
y = input()
distinct = False

while distinct == False:
    y = int(y)
    y = y + 1
    digits = [0,0,0,0,0,0,0,0,0,0]
    y = str(y)
    count = 0
    for i in range(0, len(y)):
        index = int(y[i])
        if digits[index] == 0:
            digits[index] = 1
            count = count + 1
        else:
            break
    if count == len(y):
        distinct = True
print(y)
