What is "jotto"

Jotto (sometimes Giotto ) is a logic-oriented word game played with two players, a writing implement, and a piece of paper. Each player picks a secret word of five letters (that is in the dictionary, generally no proper nouns are allowed, and generally consisting of all different letters), and the object of the game is to correctly guess the other player's word first. Players take turns guessing and giving the number of Jots, or the number of letters that are in both the guessed word and the secret word. The positions of the letters don't matter: for example, if the secret word is OTHER and a player guesses PEACH, he gets a reply of 2 (for the E and the H, even though they're in the wrong positions). Using a written-out alphabet, players cross out letters that are eliminated with Jot counts of 0 and other logical deductions.