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 isUnique(n):
    x={}
    b=n
    while(b>0):
        k=0
        if(b%10 not in x):
            k+=1
            x[b%10]=k
        b=b/10
    if len(x)<4:
        return False
    return True
n=int(raw_input())
while(True):
    n+=1
    if(isUnique(n)==True):
        break
print n