Match the following hulling mechanisms (Column 1) with the corresponding machines (Column 2).
\[ \begin{array}{|c|c|} \hline \textbf{Column 1} & \textbf{Column 2} \\ \hline \text{P: Shear and compression} & \text{1: Blade type emery scourer} \\ \text{Q: Friction and abrasion} & \text{2: Horizontal Gota machine} \\ \text{R: Shear, compression and friction} & \text{3: Rubber roll dehusker} \\ \text{S: Impact, abrasion and friction} & \text{4: Under runner disc sheller} \\ \hline \end{array} \]