Seven friends sat in a movie theater in a row containing 7 seats, numbered 1 to 7 from left to right. (The directions "left" and "right" are from the point of view of the people as they sit in the seats.) During the movie George went to the lobby to get some popcorn. When he returned, he found that Harry had moved three seats to the right, Iris had moved one seat to the left, and Jack had moved one seat to the right. Kevin and Liam had switched seats, and Mike had stayed in his original seat, leaving an end seat for George. In which seat had George been sitting before he got up?