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 math
g = lambda x: map( x, input().split() )

def dig( n ):
    for i in range( len(n) - 1 ):
        for j in range( i + 1, len(n) ):
            if n[i] == n[j]:
                return False
    return True

def main():
    n = int( input() )
    n += 1
    while n <= 10**5:
        x = dig( str( n ) )
        if x:
            return n
        n += 1
print( main() )