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
x=int(input())
test=False
y=x+1
s=''
chck=0
def check(string):
    for i in range(1,4):
        if(string[0]==string[i]):
            return False
    for i in range(2,4):
        if(string[1]==string[i]):
            return False
    if(string[2]==string[3]):
        return False
    return True
        
        
        
while(test==False):
    s=str(y)
    result=check(s)
    if(result==True):
        print(y)
        test=True
    y=y+1