INTRO
1.-------------------------------
2.-----6-----5-----8-----6-----5v
3.---7-----7-----7-----7-----7---
4.-5-----5-----5-----5-----5-----
5.-------------------------------
6.-------------------------------
gtr 2
1.-----------------------------------------------
2.-10----13----8----6----8----8-----10-13-8-6-8-8
3.-9 ----12----7----5----7----7-----9 -12-7-5-7-7
4.-7 ----11----5----3----5----5-----7 -11-5-3-5-5
5.-----------------------------------------------
6.-----------------------------------------------