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