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 unique(sentence):
    seen = set()
    return [x for x in sentence if not (x in seen or seen.add(x))]
str1 = input()
str2 = int(str1) + 1
#print("Value of str2 is : ", str2)
while True:
    str3 = unique(str(str2))
    if len(str3) == len(str1):
        print("".join(str3))
        break
    else:
        #print("Value of str2 is : ", str2)
        str2 = str2 + 1
