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 years (year):
    a = 0
    ls = [year[0], year[1], year[2], year[3]]
    ls.sort()
    if ( ls[0]< ls[1] and ls[1]<ls[2] and ls[2]<ls[3]):
        a= a+1
    return (bool(a==1))
    
year = str(1+int(input()))
while not (years(year)):
    year = str(int(year)+1)
print (year)