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.stdin = open('in.txt', 'r')  
# sys.stdout = open('out.txt', 'w') 

year = int(input())
year += 1
while True:
	s = set()
	num = year
	while num > 0:
		s.add(num % 10)
		num //= 10
	if len(s) == 4:
		break;
	year += 1
print(year)