13 possible answers to
Answers with 3 characters: HEY Answers with 4 characters: HIHO HIYA WAVE Answers with 5 characters: HOWDY HIGUY HOWDO Answers with 6 characters: YOOHOO Answers with 7 characters: HITHERE Answers with 8 characters: HEYTHERE HOWAREYA Answers with 9 characters: HOWGOESIT Answers with 12 characters: WHATSCOOKING