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
n = int(input())
while (True):
    x = n + 1
    s = str(x)
    l=[]
    for i in s:
        l.append(i)
    l.sort()
    
    count=0
    for j in range(len(l)):
        if (j == len(l) - 1):
            break
        if (l[j] != l[j + 1]):
            count += 1
    if (count+1== len(l)):
        print(x)
        break
    else:
        n=n+1
    
