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())
while(1):
    n+=1
    a=[0 for i in range(6)]
    n=str(n)
    a[0]=int(n[0])^int(n[1])
    a[1]=int(n[0])^int(n[2])
    a[2]=int(n[0])^int(n[3])
    a[3]=int(n[1])^int(n[2])
    a[4]=int(n[1])^int(n[3])
    a[5]=int(n[2])^int(n[3])
    f=0
    n=int(n)
    for i in range(6):
        if a[i]==0:
            f=1
            break
    if f==0:
        print(n)
        break
        
        
    
    
    
