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
year = input()
test = year
test = int(test) + 1
test = str(test)

def uniqueYear(string):
    for i in range(len(string)):
        for j in range(i + 1, len(string)):
            if string[i] == string[j]:
                return True
    
    return False

while uniqueYear(test):
    test = int(test) + 1
    test = str(test)

print(test)

