- "(({f1} <= {f2}) AND ({f2} <= {u1})) "
- "OR (({f1} <= {u2}) AND ({u2} <= {u1})) "
- "OR (({f2}<={f1}) AND ({u1}<={u2}))"
- .format(f1=f1, u1=u1, f2=f2, u2=u2))
+ f"(({f1} <= {f2}) AND ({f2} < {u1})) "
+ f"OR (({f1} < {u2}) AND ({u2} <= {u1})) "
+ f"OR (({f2}<={f1}) AND ({u1}<={u2}))")