There are five students $S_1, S_2, S_3, S_4$ and $S_5$ in a music class and for them there are five seats $R_1, R_2, R_3, R_4$ and $R_5$ arranged in a row, where initially the seat $\mathrm{R}_{\mathrm{i}}$ is allotted to the student $\mathrm{S}_{\mathrm{i}}, \mathrm{i}=1,2,3,4,5$. But, on the examination day, the five students are randomly allotted the five seats.
The probability that, on the examination day, the student $S_1$ gets the previously allotted seat $R_1$, and NONE of the remaining students gets the seat previously allotted to him/her is