---

words = ['eat', 'tea', 'tan', 'ate', 'nat', 'bat']

groups = []

for word in words:
    key = ''.join(sorted(word))
    found = False

    for group in groups:
        if group[0] == key:
            group[1].append(word)
            found = True
            break

    if not found:
        groups.append([key, [word]])

for group in groups:
    group[1].sort()

groups.sort()

result = []

for group in groups:
    result.append(group[1])

print(result)