$'a'
 -0ia2mia2mia2mia2mia2mia2mia2miai(!!)#
$'main'
 -0(!!){a}-()()1a(!!)s(!b!)(b)(b)1c----\
/        /------                       |
|       @       >g0(b)-                |
|            /1-       >qfq[-]---(!p!)-/
 \---------o----0------