supplementary_material.txt

Supplementary Figure 1: A monkey.

 _
| |
 -
 |
 | /
 |        /
 --------/
 |
 |
  \
   \

Supplementary Figure 2: Unhappy Monkey

 __
|. |
/--\
 |
 | /
 |        
 --------\
 |        \
 |
  \
   \