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
array = []
count = 0

n = int(input())

i = n + 1

while True :
    k = str(i)
    for j in range(0, 4) :  
        array.append(int(k[j]))
    for t in range(0, 10) :
        if array.count(t) == 1 : count += 1
    if count == 4 :
        print(i)
        break
    else :
        count = 0
        array =[]
    i += 1