def fun4(l):
num1=[num for elme in l for num in elme]
l1=list()
for i in range(0,len(num1)):
if i%2==0:
l1.append(num1[i]*num1[i+1])
return l1
def fun4(l):
num1=[num for elme in l for num in elme]
l1=list()
for i in range(0,len(num1)):
if i%2==0:
l1.append(num1[i]*num1[i+1])
return l1
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