SOLm RE# RE MI ------------------------------------------------------ SI ---1-3-1--------------------------------------------1- SOL -3-------3---3-2--0------------0------0-------2---3--- RE --------------------3--1--1-1-3--1-1-3--1-1-3--------- fig.2 SOLm RE# RE MI ------------------------------------------------------ SI ---1-3-1---------------------------------------------- SOL -3-------3---3-2--0------------0------0-------2--3--2- RE --------------------3--1--1-1-3--1-1-3--1-1-3--------- fig.3 SOLm RE# SOLm RE# MI ---------------------------------------------------- SI ---------------------------------------------------- SOL -3-2-0---3-2-0----------0---3-2-0---3-2-0---------0-