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--- a an - sandwich

--- a an - pen

--- a an - apple

--- a an - sandwiches

--- a an - bag

--- a an - bike

--- a an - trainer

--- a an - book

--- a an - apples

--- a an - camera

--- a an - diary

--- a an - umbrella

--- a an - hat

--- a an - ID card

--- a an - books

--- a an - exercise book

--- a an - watch