Which replacement algorithm is the given figure represents for page reference string: $12342156212376326$ with $3$ frames?

$123421562123$

$76$

$326$

$11$

$1$

$11$

$33$

$2$

$222$

$3$

$22$

$27$

$34$

$56$

$66$

$6$

FF

FF

F

$4$

$5$

First In First Out

$6$

Most Recently Used

$7$

Optimal Page replacement

$8$

$9$

$10$

$11$

$12$

Least Recently Lised

Mostly cloudy

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