def main():
    list1 = ["Hello ", "take "]
    list2 = ["Dear", "Sir"]

    mtx = [[0,0],[0,1],[1,0],[1,1]]

    list3 = [f'{list1[mtx[i][0]]}{list2[mtx[i][1]]}' for i in range(len(mtx))]

    print('==Exercise 6==')
    print(list3)
    print('==End Of Ex6==')
    return 0

if __name__ == '__main__':
    main()