需求：
input: ['cat', 'dog', 'tac', 'god', 'act', 'dgo']
output: [['cat', 'tac', 'act'], ['dog', 'god', 'dgo']]
代码实现：
lst = ['cat', 'dog', 'tac', 'god', 'act', 'dgo']
dic = {}
for i in lst:
j = sorted(list(i))
j = tuple(j)
if j not in dic:
dic[j] = [i]
else:
dic[j].append(i)
print(list(dic.values()))