Which Haryana MLA changed parties thrice in a fortnight in 1967, giving rise to the phrase Aya Ram Gaya Ram?

1. Gaya Lal switched from Congress to United Front and back. 2. Rao Birendra Singh said Gaya Ram was now Aya Ram. 3. The Constitution was later amended against defection. _Source: syllabus Political Science, Politics in India since Independence, Chapter 5, Challenges to and Restoration of the Congress System._