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
import fileinput

ymax = 9001
y = fileinput.input().next()
y = int(y)

def d(n):
    ans = []
    while n>0:
        d = n % 10
        n = n / 10
        ans.append(d)
    return ans

def b(y):
    di = d(y)
    return len(frozenset(di)) == len(di)


while True:
    y = y + 1
    if b(y): break

print y    
