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
sys.setrecursionlimit(20000)

def getlist(tcast):
	return [tcast(x) for x in input().strip().split(' ')]
def getval(tcast):
	return tcast(input().strip())
def getmatrix(r, tcast):
	mat = []
	for i in range(r):
		mat.append(getlist(tcast))
	return mat

start = getval(int) + 1

def uniq(x):
	return len(set(x)) == len(x)

while not uniq(str(start)):
	start += 1

print(start)