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 = input()
z = int(y)+1
y = str(z)
x = list(y)
a,b,c,d = int(x[0]),int(x[1]),int(x[2]),int(x[3])
while(a == b or a == c or a == d or b==c or b==d or c == d):
    z += 1
    w = list(str(z))
    a,b,c,d = w[0],w[1],w[2],w[3]
print(z)

