def parse_bond_line(line):
    """
    Parses a line from a bondblock and turns it into a dict

    111222tttsssxxxrrrccc
    111 = number of atom 1
    222 = number of atom 2
    ttt = bond type
    sss = bond stereo
    xxx = not used
    rrr = bond topology
    ccc = reacting center status
    """
    ret = {"111": int(float(line[0:3])), "222": int(float(line[3:6])), "ttt": int(float(line[6:9])),
           "sss": int(float(line[9:12])), "xxx": int(float(line[12:15])), "rrr": int(float(line[15:18])),
           "ccc": int(float(line[18:21]))}
    return ret