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=input("")
datalen=len(a)
i=a
while(int(i)>0):
    temp_list=[]
    for j in str(int(i)+1):
        if j not in temp_list:
            temp_list.append(j)
    if(datalen==len(temp_list)):
        print(int(i)+1)
        break
    else:
        i=int(i)+1
    