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
jaar = int(input())

def uniek(x):
    enig = True
    for i in range(0,4):
        for j in range(i+1,4):
            if x[i] == x[j]:
                enig = False
                break
    if enig == True:
        return True
    else:
        return False

for i in range(jaar + 1, 9999):
    if uniek(str(i)) == True:
        print(i)
        break

