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())
m=str(n+1)
j=2
while True:
    k=0
    if m[0]==m[1] or m[0]==m[2] or m[0]==m[3] or m[1]==m[2] or m[3]==m[1] or m[2]==m[3]:
        k+=1
    if k!=0:
        m=str(n+j)
        j=j+1
    else:
        break
print(int(m))