a2_2[10] a2_2[2] a2_2[1] a2_1[10] a2_1[2] a2_1[1] a2_10[10] a2_10[2] a2_10[1] a1_2[10] a1_2[2] a1_2[1] a1_1[10] a1_1[2] a1_1[1] a1_10[10] a1_10[2] a1_10[1] a10_2[10] a10_2[2] a10_2[1] a10_1[10] a10_1[2] a10_1[1] a10_10[10] a10_10[2] a10_10[1]