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=int(input())

def unique(s):
    l=[]
    p=2
    for i in range(4):
        if s[i] not in l:
            l.append(s[i])
            p=1
        else:
            p=0
            break
    if p==1:
        return True
    else:
        return False


for i in range(a+1,9999):
    b=str(i)
    if unique(b)==True:
        print(i)
        break