50 - listen (! presentation)
60 - memorize (! presentation)
105 - 5 digit sequence
109 - 9 digit sequence
113 - 13 digit sequence
1,2,3,4,5,6,7,8,9,10 digits (0=10)
171 - retention 1 s
180 - recall (mic image)
190 - end
100 - rest