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
from Queue import * # Queue, LifoQueue, PriorityQueue
from bisect import * #bisect, insort
from datetime import * 
from collections import * #deque, Counter,OrderedDict,defaultdict
#set([]) 
import calendar
import heapq
import math
import copy
import itertools
import string
myread = lambda : map(int,raw_input().split())

def OK(n):
    count = Counter(str(n))
    return len(count) == 4

def solver():
    n = input()
    n += 1
    while True:
        if OK(n):
            print n
            return
        n += 1



if __name__ == "__main__":
    solver()
    
