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())
flag = 0
n = n +1
while(flag == 0):
    a = list(map(int, str(n)))
    cnt = 0
    for i in range(len(a)):
        for j in range(i+1,len(a)):
            if(a[i] == a[j]):
                cnt = cnt+1
    if(cnt==0):
        flag = 1
        print("".join(map(str, a)))
    else:
        flag=0
        n = n + 1
        
    
