DIAGRAM ABSTRACTDESCRIPTION 0 b c d ac bc cd abc CONTOURS a|562|343|530|341|470|335|482|275|498|255|566|335| b|610|355|602|355|561|350|579|353|482|359|555|409|616|409|677|409|677|366|677|323|644|319|644|291|645|261|542|275|514|295|506|335|546|339|590|341| c|452|335|476|338|524|344|578|351|594|351|615|347|685|303|685|247|686|188|604|165|543|165|482|165|420|165|409|287|450|255|410|335|466|339|438|335|464|275| d|418|295|361|347|385|341|458|341|498|343|442|335|458|275|