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
dis_von = 0
set = []
data = int(input())
while dis_von == 0:
    data += 1
    data = str(data)
    for u in range(4):
        if u == 0:
            set.append(data[u])
        elif data[u] not in set:
            set.append(data[u])
        if len(set) == 4:
            dis_von = 1
    set = []
    data = int(data)
print(data)
