Given: Three tab asphalt shingles and the first course is started at gable end with a full shingle. Shingles are to be laid out in thirds. The second course should start with a full shingle minus ___ inches.

Given: Three tab asphalt shingles and the first course is started at gable end with a full shingle. Shingles are to be laid out in thirds. The second course should start with a full shingle minus ___ inches.