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

Crossing File	Backbone Overlay
1tc1_A	1tc1_A_sse
1tc3_C	1tc3_C_sse
1tca	1tca_sse
2tct	2tct_sse