In an Additional$-$Reference$-$Bits Algorithm, each page has an $8-$bit shift register. The bit associated with each page referenced is set to $1$ by the hardware. These $8-$bit shift registers contain the history of page use for the last eight time periods. At each of $8$ intervals, OS shifts the reference bit into the most significant bit, and does a logical right shift.

After the $\backslash (8^\{\backslash$text $\{$th $\}\}\backslash )$ interval, shift register contents of five pages are as given:

$1.$ Enter the page number of the Least Recently Used page

$2.$ Enter the page number of the Most Recently Used page

Enter just the number, nothing else