BCUCOF  3
CHECK_BOUNDARY  1
CONMOD  1
EVAL    1
FIND_BOUNDARY_INTERSECT  1
GET_DX_DY  2
GRID_BOX  1
IMPROVE_ROOT  1
IMPROVE_ROOT_X  2
IMPROVE_ROOT_Y  2
JUMP_BACK  1
ONE_COLOR  2
SORT_UP  1
START_TRIP  1
SUCCESSFUL_TRIP  2