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

Crossing File	Backbone Overlay
1gr0_A	1gr0_A_sse
1gri_A	1gri_A_sse
1grj	1grj_sse
1grw_A	1grw_A_sse
3grs	3grs_sse