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
p=int(input())
p+=1
u=str(p)
a=int(u[0])
b=int(u[1])
c=int(u[2])
d=int(u[3])
while a==b or a==c or a==d or b==c or b==d or c==d:
    p+=1
    u=str(p)
    a=int(u[0])
    b=int(u[1])
    c=int(u[2])
    d=int(u[3])
print(p)
    
    

        
