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
num = int(input())
flag = 0
while True :
    num = num + 1
    #print(num)
    strnum = str(num)
    for i in range(len(strnum)) :
        #print(flag,i,strnum[i],strnum[0:i]+strnum[i+1:])
        if strnum[i] in (strnum[0:i]+strnum[i+1:]) :
            flag = 2
            #print(flag)
            break
        else :
            flag = 1
            #print(flag)
    if flag == 2 :
        continue
    if flag == 1 :
        break
print(num)
