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
def isUnique(st): 
    if len(st) > 256: 
        return False
 
    char_set = [False] * 128
    for i in range(0, len(st)): 
        val = ord(st[i]) 
        if char_set[val]: 
            return False
  
        char_set[val] = True
  
    return True
def check(n):
    n=int(n)
    while(n <= 9012):
        n+=1
        st=str(n)
        flag=isUnique(st)
        if flag:
            return n
    
def main():
    # for i in range(1,n):
        # print(type(s))
    n=input()
    # print(type(n))
    ans=check(n)
    print(ans)
    # m, n = map(int, input().split())
main()