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diff --git a/interfaces/08-composition/game.go b/interfaces/composition/game.go
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diff --git a/interfaces/08-composition/list.go b/interfaces/composition/list.go
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diff --git a/interfaces/08-composition/main.go b/interfaces/composition/main.go
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diff --git a/interfaces/08-composition/money.go b/interfaces/composition/money.go
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diff --git a/interfaces/08-composition/product.go b/interfaces/composition/product.go
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diff --git a/interfaces/08-composition/puzzle.go b/interfaces/composition/puzzle.go
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diff --git a/interfaces/08-composition/toy.go b/interfaces/composition/toy.go
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