This file points to 4 pairs of files of the form    "?s2*"
("?" is a single-character wildcard and "*" is a multiple-character wildcard.)

Crossing File	Backbone Overlay
1s29_A	1s29_A_sse
1s2b_A	1s2b_A_sse
1s2d_A	1s2d_A_sse
1s2w_A	1s2w_A_sse