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()
a=int(s)
flag=0
while(flag!=1):
    a=a+1 
    t=str(a)
    tag=1 
    for i in range(len(t)-1):
        for j in range(i+1,len(t)):
            if(t[i]==t[j]):
                tag=0
                break
    if(tag==1):
        flag=1
        output=t 
    tag=0
    
print(output)        
        
    