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 isDistinct(year):
    l=[0]*10
    while(year>0):
        index=year%10
        l[index]+=1
        if(l[index]==2):
            return False
        year//=10
    return True
year=int(input())
flagi=True
while(flagi):
    year+=1
    if isDistinct(year):
        flagi=False
print(year)
