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())

y += 1

y_string = str(y)

invalid = True

while invalid:
    y_sorted = ''.join(sorted(y_string))
    invalid = False
    for i in range(len(y_sorted) - 1):
        if y_sorted[i] == y_sorted[i+1]:
            invalid = True
    
    if invalid:
        y += 1
        y_string = str(y)

print(y)