0 1 1X0 2 3 3X2 #### 0 ________1 1X _______2 2_X ______3 3__X _____4 4___X ____5 5____X ___6 6_____X __7 7______X _8 8_______X 9 9________X0 #### 0__ __3 1_ X _4 2 X X 2 3X X X0 4_X_X_1