ASCII
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... in a given location, the molecule whose nucleus is closest to the
center of the cube is used. Each molecule is described by its
molecular formula, rendered in ASCII for maximum readability if
matter-transport mail is inadvertently delivered to a human recipient
...
... and displayed on a terminal screen. Each molecule is followed by a
space (ASCII 32) to separate it from the subsequent molecule
description. Extremely long molecules may require the use of a
content-transfer-encoding ...