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())
flag = 	0
while flag == 0:
    x = x+1
    temp = x
    #print("temp is ",x)
    arr=[]
    for i in range(10):
    	arr.append(0)
    while temp > 0:
    	arr[temp%10]=arr[temp%10]+1
    	temp=temp//10
    	'''print(type(temp))
    	print (temp)'''
    for i in range(10):
    	if arr[i] > 1:
    		flag = 0
    		break
    	elif arr[i] is 1:
    		flag = 1
    if temp > 9000:
    	break
    #print (temp)
print(x)