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 main():
	N = int(raw_input())
	while True:
		N += 1
		C = {}
		P = False
		for i in xrange(1, 5):
			mod = 10 ** i
			cur = ( N % mod - N % (mod / 10) ) / ( mod / 10 )
			
			if cur in C:
				C[cur] += 1
			else:
				C[cur] = 1
			
			if C[cur] == 2:
				P = True
				break
		if not P:
			print N
			return

main()