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
import sys

def beautiful(num):
    s = str(num)
    d = {}
    
    for ch in s:
        if (d.has_key(ch)):
            return False
        else:
            d[ch] = 1
            
    return True

year = int(sys.stdin.readline().strip())
year = year + 1

while(True):
    if (beautiful(year)):
        print year
        break
    else:
        year = year + 1
        
        