General code for flashcards. Once you memorize what is already on the screen, click next. Text is chosen at random, except that it won't repeat the same one in a row.
R^ 344 Rv 433 2v 322 3v 2-- 4^ -22 4v 332 5^ 233 5v 22- 6^ --2 6v 333 7^ 223 7v 222
