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
#Codeforces
# A 271 Beautiful Year

Year = input()
Year = int(Year)
Year = Year +1
Year = str(Year)

FoundDistinctYear = False


while FoundDistinctYear == False:

    distinct = []
    for i in Year:
        if i not in distinct:
            distinct.append(i)

    if len(distinct) == 4:
        FoundDistinctYear = True
    else:
        Year = int(Year)
        Year = Year+1
        Year = str(Year)

print(Year)

    
    
