There are 2 different rhythms involved with the same basic riff. The intro and verse being slightly different. It's not easy to show the exact timing, but I had a shot. The easiest way is to listen to the recording, and you'll hear the emphasis on different notes. Speaking for myself, I hear the emphasis on the Bm in the intro, and during the verse, I hear it on the lead-in note. I will add that each time you play a verse, you play the intro rhythm once first before settling in to the verse rh (guitartabs.cc)
