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
k = int(input())

while True:
    
    k+= 1
    n = k
    n1 = n // 1000
    r1 = n % 1000
    n2 = r1 // 100
    r2 = r1 % 100
    n3 = r2 // 10 
    n4 = r2 % 10
    
    if n1 != n2 and n1 != n3 and n1 != n4 and n2 != n3 and n2 != n4 and n3 != n4:
        print(n)
        break
        