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
def Unique(x):
    
    n=len(x)
    flag=True
    for i in range(n-1):
        for j in range(i+1,n):
            if x[i]==x[j]:
                flag=False
                break
        if flag==False:
            break
    
    return flag
n=input()

while True:
    n+=1
    s=n
    x=[]
    while s<>0:
        x.append(s%10)
        s/=10
    
    if Unique(x):
        
        print n
        break
    
