 |
| Starting with undp, an undip word for tetrahedrane, |
 |
| concatenate ud, an undip word for acetylene... |
 |
| ...and get undpud, or benzvalene. |
Insertion of undip words works just as well as concatenation. At any place in an undip word, insert another undip word and the result is a new undip word describing a hybrid shape. The new shape is 2-edge connected where the two original shapes are tenuously joined.
The structural weakness of this 2-edge join can later be healed by viable adjacent-letter (val) mutations. Val mutations are substitutions, insertions, or deletions of two adjacent letters that can be made without reference to context because they intrinsically satisfy the undip grammar rules.
