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('input.in','r')
# sys.stdout=open('output.out','w')
n=list(map(int,input().strip().split()[:4]))
p=int(''.join(map(str,n)))
s=[1,1]
while len(set(s))!=len(s):
	p+=1
	s=list(map(int,str(p)))
print(p)