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 fun(s):
    a=[0,0,0,0,0,0,0,0,0,0]
    for c in s:
        a[int(c)-1]+=1
    cnt=0
    for j in a:
        if j==1:
            cnt+=1
    if cnt==4:
        return True
    else:
        return False

        
y=input()
y=str(int(y)+1)
while not fun(y):
    y=str(int(y)+1)

print(y)
    

