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=int(input(""))
count=0
for i in range(5000):
 s1=str(s+1)
 list1=[]
 for i in s1:
    list1.append(i)
 set3=list(set(list1))
 for j in set3:
    count+=1
 if count==4:
    print(s1)
    break
 else:
    s=int(s1)
    count=count-count
