A portable electronic device for presenting a recommendation message is described. The device includes display; one or more processors; and memory storing one or more programs for execution by the one or more processors. The device detects a trigger event based on a user input, the trigger event initiating a receipt of non-tactile user input; and, in response to detecting the trigger event, receives non-tactile user input. The device generates one or more character strings based on the non-tactile user input and one or more predefined string generation rules. Each character string of the one or more character strings includes multiple characters. The device generates a recommendation message that includes the one or more character strings; and displays the recommendation message on the display. A corresponding method and a computer readable storage medium storing one or more programs for execution by the portable electronic device are also described.