22T2 Q10 — equi-group (anagram grouping)

Read whitespace-separated words from stdin. Group words having the same multiset of characters (anagrams). Output groups ordered by size descending, ties broken by the group's sorted word list. Each line: the group size followed by its words in lexicographic order, space-separated.

$ echo eat tea ate bat tab cat | ./prog
3 ate eat tea
2 bat tab
1 cat

Python only. From COMP2041/9044 22T2 Final.