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

Crossing File	Backbone Overlay
1bqc_A	1bqc_A_sse
1bqk	1bqk_sse
1bqu_A	1bqu_A_sse
1bqv	1bqv_sse