# Revision history [back]

Give this one a try:

def find_common_lists(lists):
common_lists = []
for i in range(len(lists)):
for j in range(i+1, len(lists)):
if set(lists[i]) & set(lists[j]):
common_lists.append(lists[i])
common_lists.append(lists[j])
return common_lists

def find_largest_common_lists(lists):
largest_common_lists = []
for i in range(len(lists)):
for j in range(i+1, len(lists)):
if set(lists[i]) & set(lists[j]):
common_lists = [lists[i], lists[j]]
for k in range(j+1, len(lists)):
if set(lists[k]) & set(common_lists[0]):
common_lists.append(lists[k])
if len(common_lists) > len(largest_common_lists):
largest_common_lists = common_lists
return largest_common_lists

# Test the find_common_lists function
lists = [ [1, 2, 3, 4], [1, 3, 1, 3], [4, 1, 4, 1], [1, 3, 2, 1], [4, 1, 2, 4] ]
print(find_common_lists(lists))

# Test the find_largest_common_lists function
lists = [ [1, 2, 3, 4], [1, 3, 1, 3], [4, 1, 4, 1], [1, 3, 2, 1], [4, 1, 2, 4] ]
print(find_largest_common_lists(lists))



Give this one a try:

def find_common_lists(lists):
common_lists = []
for i in range(len(lists)):
for j in range(i+1, len(lists)):
for k in range(len(lists[i])):
if set(lists[i]) & set(lists[j]):
lists[i][k] == lists[j][k]:
common_lists.append(lists[i])
common_lists.append(lists[j])
break
return common_lists

def find_largest_common_lists(lists):
largest_common_lists = []
for i in range(len(lists)):
for j in range(i+1, len(lists)):
for k in range(len(lists[i])):
if set(lists[i]) & set(lists[j]):
lists[i][k] == lists[j][k]:
common_lists = [lists[i], lists[j]]
for k     for l in range(j+1, len(lists)):
for m in range(len(lists[l])):
if set(lists[k]) & set(common_lists[0]):
common_lists.append(lists[k])
lists[l][m] == lists[i][m]:
common_lists.append(lists[l])
break
if len(common_lists) > len(largest_common_lists):
largest_common_lists = common_lists
return largest_common_lists

# Test the find_common_lists function
lists = [ [1, 2, 3, 4], [1, 3, 1, 3], [4, 1, 4, 1], [1, 3, 2, 1], [4, 1, 2, 4] ]
print(find_common_lists(lists))

# Test the find_largest_common_lists function
lists = [lists = [ [1, 2, 3, 4], [1, 3, 1, 3], [4, 1, 4, 1], [1, 3, 2, 1], [4, 1, 2, 4] ]
print(find_largest_common_lists(lists))