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 retrieve_input():
    year = int(raw_input())
    return [year]

def year(data):
    year = data[0] + 1
    year_list = list(str(year))
    while len(set(year_list)) < len(list(str(data[0]))):
        year = year + 1
        year_list = list(str(year))
    return year

def main():
    data = retrieve_input()
    #data = [1988]
    #print data
    print year(data)
    
if __name__ == '__main__':
    main()