-------------------------2-4-2--------------------------2-4-2--- -5-5-5---------5-4-2-0-0--------5-5-5---------5-4-2-0-0--------- X4 --------3-3-3--------------------------3-3-3-------------------- ---------------------------------------------------------------- --------4-5-4------------------------------------2-4-2-------- -5-4-2---------7-4-5----5-5-5---------5-4-2-0-0--------------- -------------------------------3-3-3-------------------------- -------------------------------------------------------------- ------------------------------------------ ------------------------------------------ X2 ------------2222222-0--3333333--555-6-7--- -3333333-0--------------------------------