def create_matrix1(size):
    m = []
    
    for i in range(size):
        m.append([1,2,3])
        
    return m

def create_matrix2(size):
    row = [1, 2, 3]
    m = []
    
    for i in range(size):
        m.append(row)
        
    return m

def create_matrix3(size):
    row = [1, 2, 3]
    m = []
    
    for i in range(size):
        m.append(row[:])
        
    return m

def create_matrix4(size):
    return [[1,2,3]]*size

def create_matrix5(size):
    row = [1,2,3]
    
    return [row]*size

def print_out_all():
    functions = [create_matrix1, create_matrix2, create_matrix3,\
                 create_matrix4, create_matrix5]
    
    for i in range(len(functions)):
        print("create_matrix" + str(i+1) + ":")
        print(functions[i](3))
        print()
        
def test_all():
    functions = [create_matrix1, create_matrix2, create_matrix3,\
                 create_matrix4, create_matrix5]
        
    for i in range(len(functions)):        
        m = functions[i](3)
        m[0][0] = 100
        
        print("Testing create_matrix" + str(i+1) + ": ", end='')
        
        if m[1][0] == 100:
            print("Failed aliasing :(")
        else:
            print("Passed! :)")