 It is also possible for the first subject group to begin in tonic (or a key other than tonic), modulate to another key and then back to tonic for the second subject group.In the finale of the original 1872 version of Tchaikovsky's Symphony No.2, the first subject group begins in the tonic C major, modulates to E major, then through E major, and then modulates back to tonic for the second subject group and coda.