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
year = int(input())+1
while(year<10000):
    count = 0
    a = int(year/1000)
    b = int(year/100)%10
    c = int(year%100/10)
    d = year%10
    if d == c :
        year += 1
        count += 1
    if d == b :
        year += 1
        count += 1
    if d == a :
        year += 1
        count += 1
    if c == b :
        year += 10
        count += 1
        year = int(year/10)*10
    if c == a :
        year += 10
        count += 1
        year = int(year/10)*10
    if b == a :
        year += 100
        count += 1
        year = int(year/100)*100
    if count == 0 :
        break
print(year)
        
    
