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
n=int(input())
numero=[0,0,0,0]

for i in range(1000,10000):
    if i>n:
        i=str(i)
        i=list(i)
        if i[0]!=i[1] and i[0]!=i[2] and i[0]!=i[3] and i[1]!=i[2] and i[1]!=i[3] and i[2]!=i[3]:
            for p in range(4):
                numero[p]=int(i[p])
    if numero[0]!=0:
        break
for i in range (4):
    print (numero[i],end="")