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
while True:
    year = int(input())
    if 1000 <= year <= 9000 : break
year+=1
st = str(year)
test = False
l = []

while test != True :
    for i in st:
        l.append(i)
    b = set(l)
    if len(b)==len(st) : test = True
    else:
        year+=1
        st=str(year)
        l=[]
print(year)