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 isdistinct(numberstr):
    i=0
    k=0
    while i<10:
        if str(i) in numberstr:
            k=k+1
        i=i+1
    if k==4:
        return True
    else:
        return False
year=int(input())
j=0
while j<10000:
    year=year+1
    if isdistinct(str(year))==True:
        print(str(year))
        break
    j=j+1
