First set of disjoint BIBD

Second set of disjoint BIBD

Block 1 = {1, 2, 3}

Block 1 = {1, 2, 6}

Block 2 = {1, 4, 5}

Block 2 = {1, 3, 4}

Block 3 = {1, 6, 7}

Block 3 = {1, 5, 7}

Block 4 = {2, 4, 6}

Block 4 = {2, 3, 5}

Block 5 = {2, 5, 7}

Block 5 = {2, 4, 7}

Block 6 = {3, 4, 7}

Block 6 = {3, 6, 7}

Block 7 = {3, 5, 6}

Block 7 = {4, 5, 6}