Filter

int filterInput(char words[50][100], int wordsAmount) {
    for (int i = 0; i <= wordsAmount; i++) {
        for (int j = 0; j < strlen(words[i]); j++) {
            if (words[i][j] < 65 || words[i][j] > 122 || (words[i][j] > 90 && words[i][j] < 97)){
                for (int k = i; k <= wordsAmount; k++) {
                    strcpy(words[k], words[k + 1]);
                }
                wordsAmount--;
                i--;
            }
        }
    }
    return wordsAmount;
}