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
n=input()
m=int(n)
b=True
m=m+1

while(b):
    m=str(m)
    f=True
    for i in range(3):
        x=m[i]
        for j in range(i+1,4):
            if(x==m[j]):
                f=False
                break
    
    if(f==True):
        print(m)
        b==False
        break
    
    m=int(m)
    m=m+1