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 isDist(year):
    i=0
    while i<len(year):
        j=i+1
        while j<len(year):
            if year[i]==year[j]:
                return False
            j+=1
        i+=1
    return True
    
crash=input()
val=int(crash)
if val>9000 or val<1000:
    print('Error')
else:
    val+=1
    crash=str(val)
    while not isDist(crash) and (val<=9000 or val>=1000):
        val+=1
        crash=str(val)
    print(crash)