/ 3 ____ ___ 3 ____\ / 3 ____ ___ 3 ____\
/ 3 ____\ | \/ 17 I*\/ 3 *\/ 17 | | \/ 17 I*\/ 3 *\/ 17 |
\x - \/ 17 /*|x + ------ + --------------|*|x + ------ - --------------|
\ 2 2 / \ 2 2 /