This file points to 7 pairs of files of the form    "?bk*"
("?" is a single-character wildcard and "*" is a multiple-character wildcard.)

Crossing File	Backbone Overlay
1bk1	1bk1_sse
1bkb	1bkb_sse
1bkc_A	1bkc_A_sse
1bkf	1bkf_sse
1bkp_A	1bkp_A_sse
1bkr_A	1bkr_A_sse
1bkz_A	1bkz_A_sse