def common_elements(list1,list2):

common = []

count=0

for i in list1:

for j in list2:

if(i==j):

common.append(i)

count=count+1

print(common)

print("Common elements in both list is : ",count)

def common_elements_dict(list1,list2):

dict1={}

for element in list2:

dict1[element]=1

count=0

for i in list1:

if dict1.get(i)!=None:

print(i)

count=count+1

print("Number of elements common are: ", count)

l1=[2,4,6,8,10,12,14]

l2=[3,6,9,12,15,18]

common_elements_dict(l1,l2)