# Python3 code to demonstrate
# adding multiple list at once
# using + operator
# initializing lists
test_list1 = [1, 3, 5, 5, 4]
test_list2 = [4, 6, 2, 8, 10]
test_list3 = [7, 5, 2, 9, 11]
# printing original lists
print ("The original list 1 is : " + str(test_list1))
print ("The original list 2 is : " + str(test_list2))
print ("The original list 3 is : " + str(test_list3))
# using + operator
# adding multiple list at once
test_list1 = test_list1 + test_list2 + test_list3
# printing result
print ("The extended and modified list is : " + str(test_list1))