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
s=input().strip()
r=int(''.join(s))
r+=1
r=str(r)
ind=[]
while(1<2):
    for i in range(10):
        ind.append(0)
    flag=0
    s=r
    for i in range(len(s)):
        ind[int(s[i])-1]+=1
    for i in range(len(ind)):
        if(ind[i] > 1):
            flag=1
    ind=[]
    if(flag == 0):
        print(r)
        break
    else:
        r=int(r)
        r+=1
        r=str(r)