1[0] TO 1: {1, 0., "ok"} 2[0] TO 2: {2, 0., "ok"} 3[1] TO 2: {2, 1., "ok"} 4[1] TO 3: {3, 1., "ok"} 5[2] TO 3: {3, 2., "ok"} 6[2] TO 0: {0, 2., "ok"} 7[3] TO 0: {0, 3., "ok"} 8[3] TO 1: {1, 3., "ok"} 9[0] FROM 2: {0, 2., "ok"} 10[0] FROM 3: {0, 3., "ok"} 11[1] FROM 0: {1, 0., "ok"} 12[1] FROM 3: {1, 3., "ok"} 13[2] FROM 0: {2, 0., "ok"} 14[2] FROM 1: {2, 1., "ok"} 15[3] FROM 1: {3, 1., "ok"} 16[3] FROM 2: {3, 2., "ok"} 17