list1 = [[1,2,3],[1,2,3],[1,2,3]]
list2 = [[3,2,1],[4,5,6],[2,7,6]]
# Do you code below
sum1 = []
for i in range(0,len(list1)):
sub = []
for j in range(0,len(list1[i])):
a = list1[i][j]
b = list2[i][j]
sub.append(a+b)
sum1.append(sub)
print('The sum is %s'%sum1)