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 is_distinct(year):
    years = str(year)
    s = set()
    for c in years:
        if c in s:
            return False
        else:
            s.add(c)
    return True

def upper_distinct(year):
    year += 1
    while(True):
        if is_distinct(year):
            return year
        else:
            year += 1
            


def main():
    first_line = input()
    first_line = first_line.split()
    
    year = int(first_line[0])
    print(upper_distinct(year))
    


    
    
    
main()
