From DB
AB1/1
AB1/5
AB2/5

From Input
AB1/1
AB1/2
AB1/5
AB1/6
AB1/9
AB2/2
AB2/5
AB2/6
AB2/9
AB2/13

Searching
AB1/1 : Found AB1/1
AB1/1 : NotFound AB1/5
AB1/2 : NotFound AB1/5
AB1/5 : Found AB1/5
AB1/1 : NotFound AB2/5
AB1/2 : NotFound AB2/5
AB1/5 : NotFound AB2/5
AB1/6 : NotFound AB2/5
AB1/9 : NotFound AB2/5
AB2/2 : NotFound AB2/5
AB2/5 : Found AB2/5

Size of NotFound Array -1