Need in C

Write a program that reads a list of words. Then, the program outputs those words and their frequencies. The input begins with an

integer indicating the number of words that follow. Assume that the list will always contain fewer than $20$ words, and each word

contains fewer than $10$ characters.

Ex: If the input is:

$5$ hey hi Mark hi mark

the output is:

hey $-1$

hi $-2$

Mark $-1$

hi $-2$

mark $-1$

Hint: Use two arrays, one array for the strings and one array for the frequencies.