This file points to 4 pairs of files of the form    "?d6*"
("?" is a single-character wildcard and "*" is a multiple-character wildcard.)

Crossing File	Backbone Overlay
1d66_A	1d66_A_sse
1d6a_A	1d6a_A_sse
1d6b_A	1d6b_A_sse
1d6g_A	1d6g_A_sse