Как будет слово roof во множественном числе

My heart's in the Highlands, my heart is not here,
My heart's in the Highlands a-chasing the deer -
A-chasing the wild deer, and following the roe;
My heart's in the Highlands, wherever I go.

Farewell to the Highlands, farewell to the North
The birth place of Valour, the country of Worth;
Wherever I wander, wherever I rove,
The hills of the Highlands for ever I love.

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