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
god=int(input())
def beatiful_year(god):
    god=god+1
    while len(set(str(god))) <4:
        god = god + 1
    return god
print(beatiful_year(god))

# s=int(input())+1
# while len(set(str(s)))<4:
#     s+=1
# print(s)