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 raz_func(year):
    year = list(year)
    
    if year.count(year[0]) == 1 and year.count(year[1]) == 1 and year.count(year[2]) == 1 and \
        year.count(year[3]) == 1:
        return False
    return True

def codeforces():
    n = int(input())
    
    year = n + 1
    
    while raz_func(str(year)):
        year += 1
    return year
    
    
print(codeforces())
