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
"""
@author:  wangquaxiu
@time:  2020/2/23 17:33
"""

def judge_sample(year):
    l = len(year)
    for i in range(l):
        for j in range(i+1,l):
            if(year[i] == year[j]):
                return True

    return False


year = int(input())

year +=1
while(judge_sample(str(year))):
    year+=1

print(year)
  		  	  			  	  			 		 	 	  	