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
a = raw_input()

"""
for i in range(5):
    b = [int(x) for x in raw_input().split()]
    a.append(b)

a = [int(x) for x in raw_input().split()]

c = [0]
for i in range(len(a)):
    d = c[i]-a[i][0]+a[i][1]
    c.append(d)"""

n = int(a) + 1

m = str(n)

while not (m[0]!=m[1] and m[0]!=m[2]  and m[0]!=m[3]  and m[1]!=m[2]  and m[1]!=m[3]  and m[2]!=m[3]):
    n = n + 1
    m = str(n)

print n