my @Molecule_01 = ( [qw{C 0.2565522 -1.5308230 0.0000000}], [qw{C -0.8038556 -0.7047550 0.0000000}], ... ); my @Molecule_02 = ( [qw{C 0.3916152 -1.5774692 0.0000000}], ... );