return{
	{
		{
			{4,4,4,3,3,3,7,0,0,0},
			{4,1,6,6,2,3,7,0,0,0},
			{1,1,6,6,2,2,7,0,0,0},
			{1,7,7,7,7,2,7,0,0,0},
		},
		{
			{4,4,4,3,3,3,0,0,0,7},
			{4,1,6,6,2,3,0,0,0,7},
			{1,1,6,6,2,2,0,0,0,7},
			{1,7,7,7,7,2,0,0,0,7},
		},
		{
			{2,7,7,7,7,1,7,0,0,0},
			{2,2,6,6,1,1,7,0,0,0},
			{3,2,6,6,1,4,7,0,0,0},
			{3,3,3,4,4,4,7,0,0,0},
		},
		{
			{2,7,7,7,7,1,0,0,0,7},
			{2,2,6,6,1,1,0,0,0,7},
			{3,2,6,6,1,4,0,0,0,7},
			{3,3,3,4,4,4,0,0,0,7},
		},
	},--3*4 shape
	{
		{
			{1,1,0,0,0,0,0,3,3,3},
			{5,1,1,0,0,0,0,6,6,3},
			{5,5,2,2,0,0,0,6,6,4},
			{5,2,2,0,0,0,0,4,4,4},
		},
		{
			{1,1,0,0,0,0,0,4,4,4},
			{5,1,1,0,0,0,0,4,6,6},
			{5,5,2,2,0,0,0,3,6,6},
			{5,2,2,0,0,0,0,3,3,3},
		},
		{
			{3,3,3,1,1,0,0,0,0,0},
			{6,6,3,5,1,1,0,0,0,0},
			{6,6,4,5,5,2,2,0,0,0},
			{4,4,4,5,2,2,0,0,0,0},
		},
		{
			{4,4,4,1,1,0,0,0,0,0},
			{4,6,6,5,1,1,0,0,0,0},
			{3,6,6,5,5,2,2,0,0,0},
			{3,3,3,5,2,2,0,0,0,0},
		},
	},--7 piece opener(right>)(without i)
	{
		{
			{4,4,4,3,3,3,0,0,0,0},
			{4,1,6,6,2,3,0,0,0,0},
			{1,1,6,6,2,2,0,0,0,0},
			{1,7,7,7,7,2,0,0,0,0},
		},
		{
			{2,7,7,7,7,1,0,0,0,0},
			{2,2,6,6,1,1,0,0,0,0},
			{3,2,6,6,1,4,0,0,0,0},
			{3,3,3,4,4,4,0,0,0,0},
		},
	},--6 piece opener
}