This file points to 4 pairs of files of the form "?tn*"
("?" is a single-character wildcard and "*" is a multiple-character wildcard.)
Crossing File
Backbone Overlay
1tn3
1tn3_sse
1tnr_A
1tnr_A_sse
1tns
1tns_sse
2tnf_A
2tnf_A_sse