let ring1=1204423SSBDSCCCBDSCCCBDSCCCBDSCCCBDSCCC4BDCCoHSABDoHSlet ring58xBDCCoHSABDoHS6CCoHSCCSCCCSCS78xoHoHBDSoHoHSSlet ringlet ring8BDCCoHSABDoHS98xBDCCoHSABDoHS10CCoHSCCSCCCSCSlet ring118xoHoHBDSoHoHSS12SCxHSSxH13BDxHSSxH14BDxHSSxH15BDxHSSxH16BDxHSSxHlet ring17SSCCSCCCSC188xoHoHBDSoHoHSS19BDCCoHSABDoHSlet ring208xBDCCoHSABDoHS21CCoHSCCSCCCSCS228xoHoHBDSoHoHSS23SSSCCCSCCCSCCCSCCCSCCC24