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
N= input()
def areDistinct(i) : 
    i = str(i)
    b = Convert(i)
    n = len(b) 
    s = set() 
    for i in range(0, n):  
        s.add(b[i]) 
    return (len(s) == len(b)) 
    
def Convert(string): 
    list1=[] 
    list1[:0]=string 
    return list1 
def infinity():
    i=int(N)
    while True:
        i+=1
        yield i
for i in infinity():
    if areDistinct(i) and i > int(N) :  
        print(i) 
        break
    
