The user input interface, in turn, can comprise {TAIL ~ any} of {HEAD ~ a number} of devices allowing the entity to receive data from a user, such as a keypad , a touch display, a joystick or other input device 
The user input interface , in turn , can comprise { TAIL ~ any } of { HEAD ~ a number } of devices allowing the entity to receive data from a user , such as a keypad , a touch display , a joystick or other input device
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH