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
a=input()
n=int(a)
while (True):
    n+=1
    s=str(n)
    i=0
    j=i+1
    flag=True
    while (i<3) and (flag) :
        while (j<4):
            if (s[i]==s[j]):
                flag=False
                break
            else:
                j+=1
        i+=1
        j=i+1
    if (flag):
        break
print (n)
                
        
        
    