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 read_str():
    return input()
def read_int():
    return int(input())
def read_str_array():
    return [str(i) for i in input().split()]
def read_int_array():
    return [int(i) for i in input().split()]
def is_true(st):
    map = {}
    for i in st:
        if i not in map:
            map[i] = "DD"
        else:
            return False
    return True

def solve(s1):
    k = s1
    while is_true(str(k)) == False or k ==s1:
        k+=1
    return k
N = read_int()
ans = solve(N)
print(ans)
