variation on a word ladder. each row has two added letters or missing letters. letter order isn't scrambled. for exp: an and levain are appropiate follow-ups to evan, but cavern isn't/
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per salvare progressi e statistiche sui cruciverba
If you check which letters are shared in the rows above and below and then use brute force lol. My later word diamonds improved on this and make the single letters into meta contest clues.