1}-------------------------------------------------------------------------------
2}-------------------------------------------------------------------------------
3}-----2--4--5-------2--4--5--4--2-------2--4--5------2--4--5--4----------
4}--2-------------2--------------------3---------------3------------------5----
5}-------------------------------------------------------------------------------
6}-------------------------------------------------------------------------------
1 } ------------------------------------------------ -------------------------------
2 } ------------------------------------------------ -------------------------------
3 } ----- 2--4--5 ------- ------- 2--4--5--4--2 2--4--5-- ---- 2--4--5--4 ----------
4 } - 2 ------------- 2 -------------------- 3 ---------- ----- 3 ------------------ 5 ----
5 } ------------------------------------------------ -------------------------------
6 } ------------------------------------------------ -------------------------------