Example:

Input:

$54$

$31415$

$2718$

Output:

$1$

$1234578$

Explanation: $q,$ The intersection of am$1$ and am $2$ contains the elements that re comron to bath aras, The union of arr $1$ and am $2$ contains all unique elements from both aras, wht daplates

Sample input

$$

$\backslash$table$[[44],[2468],[1357]]$

Sample Output

$12345678$

Instructions: