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
y = int(input())
for i in range(y+1,9999):
    a = []
    tmp = i
    for j in range(0,10):
        a.append(0)
    for j in range(0,4):
        x = int(tmp%10)
        a[x] += 1
        tmp = tmp/10
    flag = 1
    for j in range(0,10):
        if a[j] > 1:
            flag = 0
    if flag == 1:
        ans = i
        break
print (ans)
