GLMOA3PFDR7HHJ3QMVZBNNJ3CGZAF72AZ5UBNEQON37K5WFNZP6QC
NLGQAH4H35XC5XTH26BRXVFWGPPAMA4MDN3MHMGCOYE6ZZQMQ4AAC
SXEYMYF7P4RZMZ46WPL4IZUTSQ2ATBWYZX7QNVMS3SGOYXYOHAGQC
.filter(|e| e.flag.contains(EdgeFlags::BLOCK) && !e.introduced_by.is_root())
.filter(|e| !e.introduced_by.is_root())