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
__author__ = 'Gamoool'
def check(arg):
    if((arg[0] == arg[1]) or (arg[0] == arg[2]) or (arg[0] == arg[3]) or (arg[1] == arg[2]) or (arg[1] == arg[3])or (arg[2] == arg[3])):
        return False
    else:
        return True

entry = input()
for f in range(int(entry)+1,10000,1):
    if check(str(f)) is True:
        print(f)
        break