This file points to 5 pairs of files of the form    "?a7*"
("?" is a single-character wildcard and "*" is a multiple-character wildcard.)

Crossing File	Backbone Overlay
1a73_A	1a73_A_sse
1a79_A	1a79_A_sse
1a7j	1a7j_sse
1a7s	1a7s_sse
1a7t_A	1a7t_A_sse