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_str=input()
a_int=int(a_str)
count=0
flag=1
i = a_int + 1
list=[]
while(flag):
    list.append(str(i)[0])
    i_str=str(i)
    for j in range(1,len(i_str)):
        if i_str[j] not in list:
            list.append(i_str[j])
            count+=1
            if count==len(i_str)-1:
                flag=0
                break
    i+=1
    list=[]
    count=0
print (i-1)