1$2    _____   $1_____$2
2  -'     '-$1|     |$2
3 /     ___ $1|     |$2
4|     / _ \$1|_____|$2
5'    / /_\ \
6 \  / _____ \$4___
7  $3|$2/_/  $3|   $4|   |
8  $3|     |   $4|___|
9  $3|_____|