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 hasDoubleNumber(number, length):
    for i in range(len(year_string)):
        if year_string[i] in year_string[i+1:len(year_string)]:
            return True
    return False

year = int(input())
year+=1
isCorrect = False
while(isCorrect == False):
    year_string = str(year)
    if(hasDoubleNumber(year_string, len(year_string)) == True):
        year+=1
        isCorrect = False
    else:
        print(year)
        isCorrect = True

	   	  		 			 		 	   	  	