Select the set of letters that when sequentially placed in the blanks of the given letter series will complete the series. _pwwp_w_wp_pww_w_ppp |
wpwwwp wpwpwp wwppwp wpwpww |
wpwpwp |
The required pattern is: wp / wwpp / wwwppp / wwwwpppp So, the code is: wpwpwp |