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(raw_input())
i=y+1
flag=0
while True:
    j=list(str(i))
    j.sort()
    for k in range(len(j)-1):
        if j[k]==j[k+1]:
            break
    if k==len(j)-2 and j[k]!=j[k+1]:
        flag=1
    if flag==1:
        break
    i=i+1
print i
