include "basic_2/substitution/gr2_gr2.ma".
include "basic_2/substitution/lifts_lift_vector.ma".
include "basic_2/substitution/ldrops_ldrop.ma".
include "basic_2/substitution/gr2_gr2.ma".
include "basic_2/substitution/lifts_lift_vector.ma".
include "basic_2/substitution/ldrops_ldrop.ma".