FU_0 RU_1 FU_2 RU_3 FU_2 RU_1 FU_1
XX_0 BU_0 LU_1 BU_2 FU_3 BU_2 LU_1 BU_0
XX_0 XX_0 FU_0 RU_1 FU_2 RU_3 FU_2 RU_1 FU_0
XX_0 XX_0 XX_0 BU_0 LU_1 BU_2 FU_3 BU_2 LU_1 BU_0
XX_0 XX_0 XX_0 XX_0 FU_0 RU_1 FU_2 FU_3 FU_2 RU_1 FU_0
XX_0 XX_0 XX_0 XX_0 XX_0 BU_0 FU_1 FU_2 FU_3 BU_2 FU_1 FU_0