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())
r=""
l=[]
r=str(n)
n=n+1
c=1
while(n>0 and c!=0):
   for i in range(len(r)):  
       r=str(n)    
       if r[i] in l:
          n=n+1
          l=[]
       else:
          l.append(r[i])
          if(len(l)==4):
             print n  
             c=0   
             break

