---

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

result = []
used = []

for word in words:
    if word in used:
        continue

    group = []

    for other in words:
        if sorted(word) == sorted(other):
            group.append(other)
            used.append(other)

    group.sort()
    result.append(group)

result.sort()

print(result)