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 repeat(a):
    a = str(a)
    a = list(a)
    b = []
    b.append(a[0])
    for i in range(1,len(a)):
        if a[i] not in b:
            b.append(a[i])
    if len(b) == len(a):
        return 1
    elif len(b) < len(a):
        return 0
In = int(input())
maximum = 9050
Add = 1
for i in range(In+1,maximum,Add):
    if repeat(i) == 1:
        print(i)
        break
    
    
