8 8 q-q-0-8 8 W-w q w-t E W w q-w-( q q---8 8 q-q q 0-8 8 W-w q w-t E W-q-w-( q q--W-E- t-t-t-E W E-E-E-W w W-W-W-q- w---8 8 q-q q 0-8 8 W-w q w-t E W - q w-( q q--[Wt]-[EY]- [tY] - [tY] [tY]-[EY] W [EY] - [EY] [EY]-[tY] [EY] [Wt] - [Wt] [Wt]-[qi] [wu] [wu]---[8t]- [qt]-[qt]-[0t]-[8t] [8t] [Wt]-[wt] [qY] [wY]-t [Et] [WT] - [qT] [wE]-[(E] [qt] [qt]