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 isBeautiful(year):
    for i in range(0, len(year)):
        for j in range(1 + i, len(year)):
            #print(f'{year[i]} , {year[j]}')
            if year[i] == year[j]:
                return False
    return True

year = input()
if int(year) >= 1000 and int(year) <= 9000:
    for i in range( int(year) + 1, 9013):
        if isBeautiful(str(i)):
            print(i) 
            break