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+# Debuggin mode?
+  F
+# Chemist notation for two-electron integral?
+  T
+# One-electron integrals: Ov Kin Nuc
+                          T  T   T
+# Two-electron integrals: ERI F12 Yuk Erf
+                          T   F   F   F
+# Three-electron integrals: Type1 Type2 Type3
+                            F     F     F
+# Four-electron integrals: Type1 Type2 Type3
+                           F     F     F