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 sys
if False:
    input = open('beautifulyear.txt', 'r')
else:
    input = sys.stdin

counting = int(input.readline())
found = False

while found != True:
	counting = counting + 1
	year = str(counting)
	if year[0] != year[1] and year[0] != year[2] and year[0] != year[3] and year[1] != year[2] and year[1] != year[3] and year[2] != year[3]:
		print (year)
		found = True

