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L h t r h dL h t r h dL h t r h dL h t r h d
L h t r h dL h t r h dL h t r h dL h t r h dL h t r h dL h t r h dL h t r h dL h t r h d
L h t r h dL h t r h dL h t r h dL h t r h dL h t r h dL h t r h dL h t r h dL h t r h dL h t r h dL h t r h dL h t r h dL h t r h d