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

Crossing File	Backbone Overlay
1sf9_A	1sf9_A_sse
1sfe	1sfe_sse
1sfp	1sfp_sse
1sfs_A	1sfs_A_sse