0 w [6e]-e-e r [5t]-t-t y [$r]-r-[3e] w [6e]--0 w [6e]-e-e r [5t]-t-t y [$r]-r-[3e] w [6w] e - 0 w [6e]-e-e t [5y]-y-y u [4i]-i-u y [6u] e - e r [6t]-t-y- [5u] e - e t [$r]-r-t e [3r]--- 0 w [6e]-e-e r [5t]-t-t y [$r]-r-[3e] w [6e]--0 w [6e]-e-e r [5t]-t-t y [$r]-r-[3e] w [6w] e - 0 w [6e]-e-e t [5y]-y-y u [4i]-i-u y [6u] e - e r [6t]-t-y- [5u] e - e t [%r]-r-e w [6e]