A friend of yours who is working as a waiter has a problem.
A group of xkcdfans have started to come to the restaurant and
order food as in the comic strip below. Each order takes him a
lot of time to figure out, but maybe you can help him.
Task
You are to write a program that finds out what was ordered
given the total cost of the order and the cost of each item on
the menu.
Input
The input starts with a line containing one integer
$n$ ($1\leq n\leq 100$), the number of
items on the menu. The next line contains $n$ spaceseparated positive integers
$c_1, c_2, \dots , c_ n$,
denoting the cost of each item on the menu in Swedish kronor.
No item costs more than $1\,
000$ SEK.
This is followed by a line containing $m$ ($1\leq m\leq 1\, 000$), the number of
orders placed, and a line with $m$ orders. Each order is given as an
integer $s$ ($1\leq s\leq 30\, 000$), the total
cost of all ordered items in SEK.
Output
For each order in the input output one line as follows. If
there is one unique order giving the specified total cost,
output a spaceseparated list of the numbers of the items on
that order in ascending order. If the order contains more than
one of the same item, print the corresponding number the
appropriate number of times. The first item on the menu has
number 1, the second 2, and so on.
If there doesn’t exist an order that gives the specified
sum, output Impossible. If there are more than one
order that gives the specified sum, output
Ambiguous.
Sample Input 1 
Sample Output 1 
3
4 5 8
3
11 13 14

Impossible
Ambiguous
1 2 2

Sample Input 2 
Sample Output 2 
6
215 275 335 355 420 580
1
1505

Ambiguous
