1-20 BCDBA ABDBB AACDD ABCCD /X3vU 0OqZ 21-40 DBBDC CADDB ADABA CBDCA xg$1 (C gZ 41-60 DABDA CDBAC ABADC AABCD h? <6 A t 61-80 CBCDB DDDDA BCDDB AACBC 2 2ViX ) 81-100 X√×√√ √√√×× ××√√√ ××√√√