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Think123 asks the user to rank the letters in the alphabet.

The user is presented with a random letter between A-Z and is prompted to enter the numeric rank of the letter. For example the rank of the letter C is 3. After the letter is ranked the result is posted and the next letter is presented until all 26 letters have been presented or the user selects "Done".

The result of the session is presented as the number of ranks correctly entered. percentage correct and solution rate in letters per second.

The last 10 results are saved and the progress in forming a relationship between a letter and it's numerical rank can be viewed.