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
def func(i):
    st=str(i)
    if st[0]==st[1] or st[0]==st[2] or st[0]==st[3] or st[1]==st[2] or st[1]==st[3] or st[2]==st[3]:
        return False
    return True

s=input()
s1=int(s)
for i in range(s1+1,9999,1):
    if func(i)==True:
        print(i)
        break
