21: 12 [[0,[]],[0,[]],[8,[2]],[0,[]]] 27: 12 [[0,[]],[0,[]],[8,[2]],[0,[]]] 32: 12 [[0,[]],[0,[]],[8,[2]],[0,[]]] 39: 12 [[0,[]],[0,[]],[8,[2]],[0,[]]] 46: 12 [[0,[]],[0,[]],[8,[2]],[0,[]]] 53: 12 [[0,[]],[0,[]],[8,[2]],[0,[]]]