d at 680 in FIG. 14; FIG. 16 is a flow diagram of the initial zip list function indicated at 614 in FIG. 12 a; FIG. 17 is a flow diagram of the remove duplicates from zip list function indicated at 752 in FIG. 16; FIG. 18 is a flow diagram of the final zip list function indicated at 616 in FIG. 12 a; FIGS. 19 a and 19 b are a flow diagram of the line index file function indicated at 618 in FIG. 12