M=OPEN; C=<(K2LA,K2R)|(K2L,K2RA)|K2RA; D=R; P=50+280; W=2; BG=FL_SBBR_M1,FL_SBB_F2:..,-4; FG=4*PLF1O,6*(PLF1L,8*PLF1O),PLF1L,4*PLF1O:50,-4; AB=30;