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 cvbn(n):
    c=0
    for i in range(0,3):
        for j in range(i+1,4):
            if(n[i]==n[j]):
                c=-1
                return("NO")
                break
        if(c==-1):
            break
    if(c==0):
        return("YES")
n=input()
n=str(int(n)+1)
while(cvbn(n)!="YES"):
    n=str(int(n)+1)
print(n)
