This file points to 8 pairs of files of the form    "?r2*"
("?" is a single-character wildcard and "*" is a multiple-character wildcard.)

Crossing File	Backbone Overlay
1r21_A	1r21_A_sse
1r26_A	1r26_A_sse
1r29_A	1r29_A_sse
1r2a_A	1r2a_A_sse
1r2j_A	1r2j_A_sse
1r2m_A	1r2m_A_sse
1r2q_A	1r2q_A_sse
1r2z_A	1r2z_A_sse