When atoms are touching, how is that communicated in the code?

According to the models that are shown, the individual atoms are represented using single letters. A code is made using the letters to show the relative orientation of the atoms. If the atoms are touching, they are all listed together in a single code. For example, R represents the round atoms while Sq represents the square atoms. If these are touching, the code for them is RSq.

The gas would begin to expand, and eventually the can would burst or explode.

Icant see the pictures