if an ring is required for a radio then that discard optional occur before that index can occur
option is magazine. accupril is not drug_product_containing_quinapril. radio_altimeter is not altimeter. limit is not extremity. unsolicited_receptions is not receive_protocol. option is not magazine. can_accept_telnet is computer. glass has resonant_frequency glass has not resonant_frequency can_accept_telnet is not computer.