OpenKattis

# Bokstavstärningar

Klara has $N$ dices with letters written on them. Each die has a letter on each of its $K$ sides. By throwing the dice and rearranging them in some arbitrary order, you can make construct a word with $N$ letters.

Write a program to count the number of valid words that can be constructed using Klara’s dice. You will get a wordlist, that contains all the $M$ valid $N$-letter words.

## Input

The first line of input contains three space-separated integers $N$, $K$ and $M$.

The next $N$ lines each describe a die. Line $i$ will contain $K$ letters, the letters on the sides of the $i$:th die.

Finally, there will be $M$ lines, the valid words. Each line will contain an $N$-letter word.

All words will only capital letters A-Z.

No letter will appear on more than one side of a die.

## Output

Your program should print a single integer: the number of valid words that can be written.

## Scoring

Your solution will be tested on a number of test case groups. To get points for a group you have to solve all the test cases in that group.

 Group Points Limits Other 1 9 $K = 2, N \le 4, M \le 100$ 2 9 $K \le 6, N \le 5, M \le 100$ 3 12 $K \le 20, N \le 6, M \le 1000$ 4 14 $K \le 15, N \le 6, M \le 10\, 000$ 5 21 $K \le 20, N \le 6, M \le 100\, 000$ 6 35 $K \le 10, N \le 13, M \le 500$
Sample Input 1 Sample Output 1
4 3 5
TSU
NKT
KMO
LJA
KATT
NATT
STOL

3