1 |---------------------------------------------------
2 |------------0-2-3--0-2-3--0--------0---------------
3 |--------0-2-----------------2-2--0------0---2------
4 |--0-2-4-------------------------------2---4---0-4--
5 |---------------------------------------------------
6 |---------------------------------------------------
1 |-------------------------------------------
2 |-------------------------0-2-3--0-2-3--0---
3 |----0----------------0-2-----------------2-
4 |--2---2-2-0-0--0-2-4-----------------------
5 |-------------------------------------------
6 |-------------------------------------------
1 |---------------------------------------------
2 |------0--------------------------------------
3 |----0-----0---2-------0----------2---2-0---0-
4 |--------2---4---0-4-2---2-2-0--0---4-----2---
5 |---------------------------------------------
6 |---------------------------------------------
1 |---------------------------------------------
2 |-----------
