Leetcode 2157. Groups of Strings

Treat each string (letters are unique) as a 26-bit mask and connect two masks if one can be obtained from the other by adding or removing one bit or by replacing one bit (i.e., one-bit edit on the set). The task is to compute the number of connected components and the size of the largest component — typically solved by generating mask transformations and using union-find or graph traversal.